Finding the Fourth Proportional to 2,139,955,536.15, 2,953,162,580.76 and 1,187,353,522.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,955,536.15 : 2,953,162,580.76 = 1,187,353,522.26 : x
2. Step 2: Convert to fraction form
   2,139,955,536.15/2,953,162,580.76 = 1,187,353,522.26/x
3. Step 3: Cross multiply
   2,139,955,536.15x = 2,953,162,580.76 × 1,187,353,522.26
4. Step 4: Simplify right side
   2,139,955,536.15x = 3,506,447,992,071,817,728
5. Step 5: Solve for x
   x = 3,506,447,992,071,817,728/2,139,955,536.15
6. Step 6: Final answer
   x = 1,638,561,144.30