Finding the Fourth Proportional to 12,723.32, 17,558.86 and 7,687.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.32 : 17,558.86 = 7,687.48 : x
2. Step 2: Convert to fraction form
   12,723.32/17,558.86 = 7,687.48/x
3. Step 3: Cross multiply
   12,723.32x = 17,558.86 × 7,687.48
4. Step 4: Simplify right side
   12,723.32x = 134,983,385.07
5. Step 5: Solve for x
   x = 134,983,385.07/12,723.32
6. Step 6: Final answer
   x = 10,609.13