Finding the Fourth Proportional to 82,139.10, 123,035.85 and 68,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,139.10 : 123,035.85 = 68,315.10 : x
2. Step 2: Convert to fraction form
   82,139.10/123,035.85 = 68,315.10/x
3. Step 3: Cross multiply
   82,139.10x = 123,035.85 × 68,315.10
4. Step 4: Simplify right side
   82,139.10x = 8,405,206,396.34
5. Step 5: Solve for x
   x = 8,405,206,396.34/82,139.10
6. Step 6: Final answer
   x = 102,328.93