Finding the Fourth Proportional to 72,443.30, 108,713.55 and 42,829.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,443.30 : 108,713.55 = 42,829.70 : x
2. Step 2: Convert to fraction form
   72,443.30/108,713.55 = 42,829.70/x
3. Step 3: Cross multiply
   72,443.30x = 108,713.55 × 42,829.70
4. Step 4: Simplify right side
   72,443.30x = 4,656,168,732.44
5. Step 5: Solve for x
   x = 4,656,168,732.44/72,443.30
6. Step 6: Final answer
   x = 64,273.28