Finding the Fourth Proportional to 9,981.72, 14,945.58 and 6,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.72 : 14,945.58 = 6,687.72 : x
2. Step 2: Convert to fraction form
   9,981.72/14,945.58 = 6,687.72/x
3. Step 3: Cross multiply
   9,981.72x = 14,945.58 × 6,687.72
4. Step 4: Simplify right side
   9,981.72x = 99,951,854.28
5. Step 5: Solve for x
   x = 99,951,854.28/9,981.72
6. Step 6: Final answer
   x = 10,013.49