Finding the Fourth Proportional to 12,681.88, 17,501.06 and 7,380.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,681.88 : 17,501.06 = 7,380.30 : x
2. Step 2: Convert to fraction form
   12,681.88/17,501.06 = 7,380.30/x
3. Step 3: Cross multiply
   12,681.88x = 17,501.06 × 7,380.30
4. Step 4: Simplify right side
   12,681.88x = 129,163,073.12
5. Step 5: Solve for x
   x = 129,163,073.12/12,681.88
6. Step 6: Final answer
   x = 10,184.85