Finding the Fourth Proportional to 14,080.32, 21,120.72 and 3,691.68

Step by Step Solution

1. Step 1: Write the proportion equation
   14,080.32 : 21,120.72 = 3,691.68 : x
2. Step 2: Convert to fraction form
   14,080.32/21,120.72 = 3,691.68/x
3. Step 3: Cross multiply
   14,080.32x = 21,120.72 × 3,691.68
4. Step 4: Simplify right side
   14,080.32x = 77,970,939.61
5. Step 5: Solve for x
   x = 77,970,939.61/14,080.32
6. Step 6: Final answer
   x = 5,537.58