Finding the Fourth Proportional to 2,288.40, 3,157.95 and 1,293.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.40 : 3,157.95 = 1,293.72 : x
2. Step 2: Convert to fraction form
   2,288.40/3,157.95 = 1,293.72/x
3. Step 3: Cross multiply
   2,288.40x = 3,157.95 × 1,293.72
4. Step 4: Simplify right side
   2,288.40x = 4,085,503.07
5. Step 5: Solve for x
   x = 4,085,503.07/2,288.40
6. Step 6: Final answer
   x = 1,785.31