Finding the Fourth Proportional to 12,681.36, 17,500.32 and 7,374.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.36 : 17,500.32 = 7,374.78 : x
2. Step 2: Convert to fraction form
   12,681.36/17,500.32 = 7,374.78/x
3. Step 3: Cross multiply
   12,681.36x = 17,500.32 × 7,374.78
4. Step 4: Simplify right side
   12,681.36x = 129,061,009.93
5. Step 5: Solve for x
   x = 129,061,009.93/12,681.36
6. Step 6: Final answer
   x = 10,177.22