Finding the Fourth Proportional to 82,442.87, 123,683.78 and 65,639.42

Step by Step Solution

1. Step 1: Write the proportion equation
   82,442.87 : 123,683.78 = 65,639.42 : x
2. Step 2: Convert to fraction form
   82,442.87/123,683.78 = 65,639.42/x
3. Step 3: Cross multiply
   82,442.87x = 123,683.78 × 65,639.42
4. Step 4: Simplify right side
   82,442.87x = 8,118,531,582.61
5. Step 5: Solve for x
   x = 8,118,531,582.61/82,442.87
6. Step 6: Final answer
   x = 98,474.64