Finding the Fourth Proportional to 2,288.47, 3,158.10 and 1,240.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.47 : 3,158.10 = 1,240.53 : x
2. Step 2: Convert to fraction form
   2,288.47/3,158.10 = 1,240.53/x
3. Step 3: Cross multiply
   2,288.47x = 3,158.10 × 1,240.53
4. Step 4: Simplify right side
   2,288.47x = 3,917,711.59
5. Step 5: Solve for x
   x = 3,917,711.59/2,288.47
6. Step 6: Final answer
   x = 1,711.93