Finding the Fourth Proportional to 2,320.55, 3,472.69 and 1,663.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,320.55 : 3,472.69 = 1,663.15 : x
2. Step 2: Convert to fraction form
   2,320.55/3,472.69 = 1,663.15/x
3. Step 3: Cross multiply
   2,320.55x = 3,472.69 × 1,663.15
4. Step 4: Simplify right side
   2,320.55x = 5,775,601.16
5. Step 5: Solve for x
   x = 5,775,601.16/2,320.55
6. Step 6: Final answer
   x = 2,488.89