Finding the Fourth Proportional to 12,685.50, 17,501.72 and 7,375.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.50 : 17,501.72 = 7,375.96 : x
2. Step 2: Convert to fraction form
   12,685.50/17,501.72 = 7,375.96/x
3. Step 3: Cross multiply
   12,685.50x = 17,501.72 × 7,375.96
4. Step 4: Simplify right side
   12,685.50x = 129,091,986.65
5. Step 5: Solve for x
   x = 129,091,986.65/12,685.50
6. Step 6: Final answer
   x = 10,176.34