Finding the Fourth Proportional to 86,782,584.30, 129,407,142.50 and 86,003,662.38

Step by Step Solution

1. Step 1: Write the proportion equation
   86,782,584.30 : 129,407,142.50 = 86,003,662.38 : x
2. Step 2: Convert to fraction form
   86,782,584.30/129,407,142.50 = 86,003,662.38/x
3. Step 3: Cross multiply
   86,782,584.30x = 129,407,142.50 × 86,003,662.38
4. Step 4: Simplify right side
   86,782,584.30x = 11,129,488,192,700,530
5. Step 5: Solve for x
   x = 11,129,488,192,700,530/86,782,584.30
6. Step 6: Final answer
   x = 128,245,641.48