Finding the Fourth Proportional to 83,221.90, 124,911.15 and 43,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   83,221.90 : 124,911.15 = 43,807.30 : x
2. Step 2: Convert to fraction form
   83,221.90/124,911.15 = 43,807.30/x
3. Step 3: Cross multiply
   83,221.90x = 124,911.15 × 43,807.30
4. Step 4: Simplify right side
   83,221.90x = 5,472,020,221.40
5. Step 5: Solve for x
   x = 5,472,020,221.40/83,221.90
6. Step 6: Final answer
   x = 65,752.17