Finding the Fourth Proportional to 82,129.12, 123,155.34 and 42,675.64

Step by Step Solution

1. Step 1: Write the proportion equation
   82,129.12 : 123,155.34 = 42,675.64 : x
2. Step 2: Convert to fraction form
   82,129.12/123,155.34 = 42,675.64/x
3. Step 3: Cross multiply
   82,129.12x = 123,155.34 × 42,675.64
4. Step 4: Simplify right side
   82,129.12x = 5,255,732,953.92
5. Step 5: Solve for x
   x = 5,255,732,953.92/82,129.12
6. Step 6: Final answer
   x = 63,993.54