Finding the Fourth Proportional to 103,081.20, 142,250.24 and 57,759.06

Step by Step Solution

1. Step 1: Write the proportion equation
   103,081.20 : 142,250.24 = 57,759.06 : x
2. Step 2: Convert to fraction form
   103,081.20/142,250.24 = 57,759.06/x
3. Step 3: Cross multiply
   103,081.20x = 142,250.24 × 57,759.06
4. Step 4: Simplify right side
   103,081.20x = 8,216,240,147.17
5. Step 5: Solve for x
   x = 8,216,240,147.17/103,081.20
6. Step 6: Final answer
   x = 79,706.49