Finding the Fourth Proportional to 82,705.40, 123,985.20 and 49,390.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,705.40 : 123,985.20 = 49,390.10 : x
2. Step 2: Convert to fraction form
   82,705.40/123,985.20 = 49,390.10/x
3. Step 3: Cross multiply
   82,705.40x = 123,985.20 × 49,390.10
4. Step 4: Simplify right side
   82,705.40x = 6,123,641,426.52
5. Step 5: Solve for x
   x = 6,123,641,426.52/82,705.40
6. Step 6: Final answer
   x = 74,041.62