Finding the Fourth Proportional to 83,124.42, 124,685.61 and 56,404.20

Step by Step Solution

1. Step 1: Write the proportion equation
   83,124.42 : 124,685.61 = 56,404.20 : x
2. Step 2: Convert to fraction form
   83,124.42/124,685.61 = 56,404.20/x
3. Step 3: Cross multiply
   83,124.42x = 124,685.61 × 56,404.20
4. Step 4: Simplify right side
   83,124.42x = 7,032,792,083.56
5. Step 5: Solve for x
   x = 7,032,792,083.56/83,124.42
6. Step 6: Final answer
   x = 84,605.61