Finding the Fourth Proportional to 72,062.80, 108,158.20 and 42,443.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,062.80 : 108,158.20 = 42,443.60 : x
2. Step 2: Convert to fraction form
   72,062.80/108,158.20 = 42,443.60/x
3. Step 3: Cross multiply
   72,062.80x = 108,158.20 × 42,443.60
4. Step 4: Simplify right side
   72,062.80x = 4,590,623,377.52
5. Step 5: Solve for x
   x = 4,590,623,377.52/72,062.80
6. Step 6: Final answer
   x = 63,703.09