Finding the Fourth Proportional to 86,061.90, 128,911.41 and 39,354.06

Step by Step Solution

1. Step 1: Write the proportion equation
   86,061.90 : 128,911.41 = 39,354.06 : x
2. Step 2: Convert to fraction form
   86,061.90/128,911.41 = 39,354.06/x
3. Step 3: Cross multiply
   86,061.90x = 128,911.41 × 39,354.06
4. Step 4: Simplify right side
   86,061.90x = 5,073,187,363.82
5. Step 5: Solve for x
   x = 5,073,187,363.82/86,061.90
6. Step 6: Final answer
   x = 58,948.12