Finding the Fourth Proportional to 22,686,404,065.61, 31,309,982,905.30 and 12,911,917,588.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,686,404,065.61 : 31,309,982,905.30 = 12,911,917,588.28 : x
2. Step 2: Convert to fraction form
   22,686,404,065.61/31,309,982,905.30 = 12,911,917,588.28/x
3. Step 3: Cross multiply
   22,686,404,065.61x = 31,309,982,905.30 × 12,911,917,588.28
4. Step 4: Simplify right side
   22,686,404,065.61x = 404,271,918,963,506,806,784
5. Step 5: Solve for x
   x = 404,271,918,963,506,806,784/22,686,404,065.61
6. Step 6: Final answer
   x = 17,820,008,750.36