Finding the Fourth Proportional to 2,288.30, 3,157.76 and 1,240.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.30 : 3,157.76 = 1,240.34 : x
2. Step 2: Convert to fraction form
   2,288.30/3,157.76 = 1,240.34/x
3. Step 3: Cross multiply
   2,288.30x = 3,157.76 × 1,240.34
4. Step 4: Simplify right side
   2,288.30x = 3,916,683.35
5. Step 5: Solve for x
   x = 3,916,683.35/2,288.30
6. Step 6: Final answer
   x = 1,711.62