Finding the Fourth Proportional to 82,157.80, 123,235.42 and 42,153.70

Step by Step Solution

1. Step 1: Write the proportion equation
   82,157.80 : 123,235.42 = 42,153.70 : x
2. Step 2: Convert to fraction form
   82,157.80/123,235.42 = 42,153.70/x
3. Step 3: Cross multiply
   82,157.80x = 123,235.42 × 42,153.70
4. Step 4: Simplify right side
   82,157.80x = 5,194,828,531.10
5. Step 5: Solve for x
   x = 5,194,828,531.10/82,157.80
6. Step 6: Final answer
   x = 63,229.89