Finding the Fourth Proportional to 82,728.90, 124,144.65 and 43,314.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82,728.90 : 124,144.65 = 43,314.30 : x
2. Step 2: Convert to fraction form
   82,728.90/124,144.65 = 43,314.30/x
3. Step 3: Cross multiply
   82,728.90x = 124,144.65 × 43,314.30
4. Step 4: Simplify right side
   82,728.90x = 5,377,238,613.50
5. Step 5: Solve for x
   x = 5,377,238,613.50/82,728.90
6. Step 6: Final answer
   x = 64,998.31