Finding the Fourth Proportional to 10,687.20, 14,742.96 and 7,150.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,687.20 : 14,742.96 = 7,150.56 : x
2. Step 2: Convert to fraction form
   10,687.20/14,742.96 = 7,150.56/x
3. Step 3: Cross multiply
   10,687.20x = 14,742.96 × 7,150.56
4. Step 4: Simplify right side
   10,687.20x = 105,420,420.06
5. Step 5: Solve for x
   x = 105,420,420.06/10,687.20
6. Step 6: Final answer
   x = 9,864.18