Finding the Fourth Proportional to 12,987, 17,925.30 and 7,401.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987 : 17,925.30 = 7,401.24 : x
2. Step 2: Convert to fraction form
   12,987/17,925.30 = 7,401.24/x
3. Step 3: Cross multiply
   12,987x = 17,925.30 × 7,401.24
4. Step 4: Simplify right side
   12,987x = 132,669,447.37
5. Step 5: Solve for x
   x = 132,669,447.37/12,987
6. Step 6: Final answer
   x = 10,215.56