Finding the Fourth Proportional to 86,590.07, 129,892.49 and 30,425.31

Step by Step Solution

1. Step 1: Write the proportion equation
   86,590.07 : 129,892.49 = 30,425.31 : x
2. Step 2: Convert to fraction form
   86,590.07/129,892.49 = 30,425.31/x
3. Step 3: Cross multiply
   86,590.07x = 129,892.49 × 30,425.31
4. Step 4: Simplify right side
   86,590.07x = 3,952,019,274.92
5. Step 5: Solve for x
   x = 3,952,019,274.92/86,590.07
6. Step 6: Final answer
   x = 45,640.56