Finding the Fourth Proportional to 82,285.30, 123,399.15 and 42,829.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82,285.30 : 123,399.15 = 42,829.30 : x
2. Step 2: Convert to fraction form
   82,285.30/123,399.15 = 42,829.30/x
3. Step 3: Cross multiply
   82,285.30x = 123,399.15 × 42,829.30
4. Step 4: Simplify right side
   82,285.30x = 5,285,099,215.10
5. Step 5: Solve for x
   x = 5,285,099,215.10/82,285.30
6. Step 6: Final answer
   x = 64,228.96