Finding the Fourth Proportional to 72,392.55, 108,538.20 and 42,795.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,392.55 : 108,538.20 = 42,795.15 : x
2. Step 2: Convert to fraction form
   72,392.55/108,538.20 = 42,795.15/x
3. Step 3: Cross multiply
   72,392.55x = 108,538.20 × 42,795.15
4. Step 4: Simplify right side
   72,392.55x = 4,644,908,549.73
5. Step 5: Solve for x
   x = 4,644,908,549.73/72,392.55
6. Step 6: Final answer
   x = 64,162.80