Finding the Fourth Proportional to 81,715.43, 122,462.43 and 42,300.23

Step by Step Solution

1. Step 1: Write the proportion equation
   81,715.43 : 122,462.43 = 42,300.23 : x
2. Step 2: Convert to fraction form
   81,715.43/122,462.43 = 42,300.23/x
3. Step 3: Cross multiply
   81,715.43x = 122,462.43 × 42,300.23
4. Step 4: Simplify right side
   81,715.43x = 5,180,188,422.36
5. Step 5: Solve for x
   x = 5,180,188,422.36/81,715.43
6. Step 6: Final answer
   x = 63,393.02