Finding the Fourth Proportional to 90,139,496.31, 135,209,034.18 and 59,210,385.21

Step by Step Solution

1. Step 1: Write the proportion equation
   90,139,496.31 : 135,209,034.18 = 59,210,385.21 : x
2. Step 2: Convert to fraction form
   90,139,496.31/135,209,034.18 = 59,210,385.21/x
3. Step 3: Cross multiply
   90,139,496.31x = 135,209,034.18 × 59,210,385.21
4. Step 4: Simplify right side
   90,139,496.31x = 8,005,778,997,669,857
5. Step 5: Solve for x
   x = 8,005,778,997,669,857/90,139,496.31
6. Step 6: Final answer
   x = 88,815,439.68