Finding the Fourth Proportional to 147,378.47, 221,046.17 and 72,478.52

Step by Step Solution

1. Step 1: Write the proportion equation
   147,378.47 : 221,046.17 = 72,478.52 : x
2. Step 2: Convert to fraction form
   147,378.47/221,046.17 = 72,478.52/x
3. Step 3: Cross multiply
   147,378.47x = 221,046.17 × 72,478.52
4. Step 4: Simplify right side
   147,378.47x = 16,021,098,148.04
5. Step 5: Solve for x
   x = 16,021,098,148.04/147,378.47
6. Step 6: Final answer
   x = 108,707.18