Finding the Fourth Proportional to 82,020.12, 122,986.42 and 42,479.16

Step by Step Solution

1. Step 1: Write the proportion equation
   82,020.12 : 122,986.42 = 42,479.16 : x
2. Step 2: Convert to fraction form
   82,020.12/122,986.42 = 42,479.16/x
3. Step 3: Cross multiply
   82,020.12x = 122,986.42 × 42,479.16
4. Step 4: Simplify right side
   82,020.12x = 5,224,359,813.01
5. Step 5: Solve for x
   x = 5,224,359,813.01/82,020.12
6. Step 6: Final answer
   x = 63,696.08