Finding the Fourth Proportional to 10,686.72, 14,748 and 5,971.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.72 : 14,748 = 5,971.20 : x
2. Step 2: Convert to fraction form
   10,686.72/14,748 = 5,971.20/x
3. Step 3: Cross multiply
   10,686.72x = 14,748 × 5,971.20
4. Step 4: Simplify right side
   10,686.72x = 88,063,257.60
5. Step 5: Solve for x
   x = 88,063,257.60/10,686.72
6. Step 6: Final answer
   x = 8,240.44