Finding the Fourth Proportional to 2,288.89, 3,158.65 and 1,240.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.89 : 3,158.65 = 1,240.93 : x
2. Step 2: Convert to fraction form
   2,288.89/3,158.65 = 1,240.93/x
3. Step 3: Cross multiply
   2,288.89x = 3,158.65 × 1,240.93
4. Step 4: Simplify right side
   2,288.89x = 3,919,663.54
5. Step 5: Solve for x
   x = 3,919,663.54/2,288.89
6. Step 6: Final answer
   x = 1,712.47