Finding the Fourth Proportional to 2,296.64, 3,169.42 and 1,248.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,296.64 : 3,169.42 = 1,248.78 : x
2. Step 2: Convert to fraction form
   2,296.64/3,169.42 = 1,248.78/x
3. Step 3: Cross multiply
   2,296.64x = 3,169.42 × 1,248.78
4. Step 4: Simplify right side
   2,296.64x = 3,957,908.31
5. Step 5: Solve for x
   x = 3,957,908.31/2,296.64
6. Step 6: Final answer
   x = 1,723.35