Finding the Fourth Proportional to 21,116,981.47, 29,141,434.43 and 11,459,189.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116,981.47 : 29,141,434.43 = 11,459,189.47 : x
2. Step 2: Convert to fraction form
   21,116,981.47/29,141,434.43 = 11,459,189.47/x
3. Step 3: Cross multiply
   21,116,981.47x = 29,141,434.43 × 11,459,189.47
4. Step 4: Simplify right side
   21,116,981.47x = 333,937,218,503,655.56
5. Step 5: Solve for x
   x = 333,937,218,503,655.56/21,116,981.47
6. Step 6: Final answer
   x = 15,813,681.47