Finding the Fourth Proportional to 14,365.90, 21,540.72 and 5,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,365.90 : 21,540.72 = 5,590.72 : x
2. Step 2: Convert to fraction form
   14,365.90/21,540.72 = 5,590.72/x
3. Step 3: Cross multiply
   14,365.90x = 21,540.72 × 5,590.72
4. Step 4: Simplify right side
   14,365.90x = 120,428,134.12
5. Step 5: Solve for x
   x = 120,428,134.12/14,365.90
6. Step 6: Final answer
   x = 8,382.92