Finding the Fourth Proportional to 12,681, 17,499.78 and 7,375.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681 : 17,499.78 = 7,375.50 : x
2. Step 2: Convert to fraction form
   12,681/17,499.78 = 7,375.50/x
3. Step 3: Cross multiply
   12,681x = 17,499.78 × 7,375.50
4. Step 4: Simplify right side
   12,681x = 129,069,627.39
5. Step 5: Solve for x
   x = 129,069,627.39/12,681
6. Step 6: Final answer
   x = 10,178.19