Finding the Fourth Proportional to 10,608.76, 14,648.70 and 9,487.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,608.76 : 14,648.70 = 9,487.72 : x
2. Step 2: Convert to fraction form
   10,608.76/14,648.70 = 9,487.72/x
3. Step 3: Cross multiply
   10,608.76x = 14,648.70 × 9,487.72
4. Step 4: Simplify right side
   10,608.76x = 138,982,763.96
5. Step 5: Solve for x
   x = 138,982,763.96/10,608.76
6. Step 6: Final answer
   x = 13,100.75