Finding the Fourth Proportional to 72,121.92, 108,047.52 and 42,450.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,121.92 : 108,047.52 = 42,450.72 : x
2. Step 2: Convert to fraction form
   72,121.92/108,047.52 = 42,450.72/x
3. Step 3: Cross multiply
   72,121.92x = 108,047.52 × 42,450.72
4. Step 4: Simplify right side
   72,121.92x = 4,586,695,018.21
5. Step 5: Solve for x
   x = 4,586,695,018.21/72,121.92
6. Step 6: Final answer
   x = 63,596.41