Finding the Fourth Proportional to 81,970.72, 123,040.32 and 42,517.24

Step by Step Solution

1. Step 1: Write the proportion equation
   81,970.72 : 123,040.32 = 42,517.24 : x
2. Step 2: Convert to fraction form
   81,970.72/123,040.32 = 42,517.24/x
3. Step 3: Cross multiply
   81,970.72x = 123,040.32 × 42,517.24
4. Step 4: Simplify right side
   81,970.72x = 5,231,334,815.12
5. Step 5: Solve for x
   x = 5,231,334,815.12/81,970.72
6. Step 6: Final answer
   x = 63,819.55