Finding the Fourth Proportional to 72,695.14, 108,978.03 and 28,311.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,695.14 : 108,978.03 = 28,311.54 : x
2. Step 2: Convert to fraction form
   72,695.14/108,978.03 = 28,311.54/x
3. Step 3: Cross multiply
   72,695.14x = 108,978.03 × 28,311.54
4. Step 4: Simplify right side
   72,695.14x = 3,085,335,855.47
5. Step 5: Solve for x
   x = 3,085,335,855.47/72,695.14
6. Step 6: Final answer
   x = 42,442.12