Finding the Fourth Proportional to 82,665.49, 123,910.43 and 52,585.09

Step by Step Solution

1. Step 1: Write the proportion equation
   82,665.49 : 123,910.43 = 52,585.09 : x
2. Step 2: Convert to fraction form
   82,665.49/123,910.43 = 52,585.09/x
3. Step 3: Cross multiply
   82,665.49x = 123,910.43 × 52,585.09
4. Step 4: Simplify right side
   82,665.49x = 6,515,841,594.35
5. Step 5: Solve for x
   x = 6,515,841,594.35/82,665.49
6. Step 6: Final answer
   x = 78,821.79