Finding the Fourth Proportional to 82,494.10, 123,745.20 and 43,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,494.10 : 123,745.20 = 43,128.10 : x
2. Step 2: Convert to fraction form
   82,494.10/123,745.20 = 43,128.10/x
3. Step 3: Cross multiply
   82,494.10x = 123,745.20 × 43,128.10
4. Step 4: Simplify right side
   82,494.10x = 5,336,895,360.12
5. Step 5: Solve for x
   x = 5,336,895,360.12/82,494.10
6. Step 6: Final answer
   x = 64,694.27