Finding the Fourth Proportional to 72,451.72, 99,981.30 and 42,243.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,451.72 : 99,981.30 = 42,243.72 : x
2. Step 2: Convert to fraction form
   72,451.72/99,981.30 = 42,243.72/x
3. Step 3: Cross multiply
   72,451.72x = 99,981.30 × 42,243.72
4. Step 4: Simplify right side
   72,451.72x = 4,223,582,042.44
5. Step 5: Solve for x
   x = 4,223,582,042.44/72,451.72
6. Step 6: Final answer
   x = 58,295.12