Finding the Fourth Proportional to 20,572.46, 30,864.18 and 8,726.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,572.46 : 30,864.18 = 8,726.72 : x
2. Step 2: Convert to fraction form
   20,572.46/30,864.18 = 8,726.72/x
3. Step 3: Cross multiply
   20,572.46x = 30,864.18 × 8,726.72
4. Step 4: Simplify right side
   20,572.46x = 269,343,056.89
5. Step 5: Solve for x
   x = 269,343,056.89/20,572.46
6. Step 6: Final answer
   x = 13,092.41