Finding the Fourth Proportional to 12,491.02, 17,241.08 and 7,187.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.02 : 17,241.08 = 7,187.55 : x
2. Step 2: Convert to fraction form
   12,491.02/17,241.08 = 7,187.55/x
3. Step 3: Cross multiply
   12,491.02x = 17,241.08 × 7,187.55
4. Step 4: Simplify right side
   12,491.02x = 123,921,124.55
5. Step 5: Solve for x
   x = 123,921,124.55/12,491.02
6. Step 6: Final answer
   x = 9,920.82