Finding the Fourth Proportional to 81,613.99, 122,158.54 and 42,117.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,613.99 : 122,158.54 = 42,117.31 : x
2. Step 2: Convert to fraction form
   81,613.99/122,158.54 = 42,117.31/x
3. Step 3: Cross multiply
   81,613.99x = 122,158.54 × 42,117.31
4. Step 4: Simplify right side
   81,613.99x = 5,144,989,098.33
5. Step 5: Solve for x
   x = 5,144,989,098.33/81,613.99
6. Step 6: Final answer
   x = 63,040.53