Finding the Fourth Proportional to 10,689.31, 14,746.60 and 7,153.66

Step by Step Solution

1. Step 1: Write the proportion equation
   10,689.31 : 14,746.60 = 7,153.66 : x
2. Step 2: Convert to fraction form
   10,689.31/14,746.60 = 7,153.66/x
3. Step 3: Cross multiply
   10,689.31x = 14,746.60 × 7,153.66
4. Step 4: Simplify right side
   10,689.31x = 105,492,162.56
5. Step 5: Solve for x
   x = 105,492,162.56/10,689.31
6. Step 6: Final answer
   x = 9,868.94