Finding the Fourth Proportional to 82,485.10, 123,731.70 and 43,119.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,485.10 : 123,731.70 = 43,119.10 : x
2. Step 2: Convert to fraction form
   82,485.10/123,731.70 = 43,119.10/x
3. Step 3: Cross multiply
   82,485.10x = 123,731.70 × 43,119.10
4. Step 4: Simplify right side
   82,485.10x = 5,335,199,545.47
5. Step 5: Solve for x
   x = 5,335,199,545.47/82,485.10
6. Step 6: Final answer
   x = 64,680.77