Finding the Fourth Proportional to 86,057.80, 128,899.76 and 41,591.30

Step by Step Solution

1. Step 1: Write the proportion equation
   86,057.80 : 128,899.76 = 41,591.30 : x
2. Step 2: Convert to fraction form
   86,057.80/128,899.76 = 41,591.30/x
3. Step 3: Cross multiply
   86,057.80x = 128,899.76 × 41,591.30
4. Step 4: Simplify right side
   86,057.80x = 5,361,108,047.57
5. Step 5: Solve for x
   x = 5,361,108,047.57/86,057.80
6. Step 6: Final answer
   x = 62,296.60