Finding the Fourth Proportional to 5,499.72, 7,590.16 and 3,142.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,499.72 : 7,590.16 = 3,142.20 : x
2. Step 2: Convert to fraction form
   5,499.72/7,590.16 = 3,142.20/x
3. Step 3: Cross multiply
   5,499.72x = 7,590.16 × 3,142.20
4. Step 4: Simplify right side
   5,499.72x = 23,849,800.75
5. Step 5: Solve for x
   x = 23,849,800.75/5,499.72
6. Step 6: Final answer
   x = 4,336.55