Finding the Fourth Proportional to 2,390.71, 3,586.20 and 747.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.71 : 3,586.20 = 747.31 : x
2. Step 2: Convert to fraction form
   2,390.71/3,586.20 = 747.31/x
3. Step 3: Cross multiply
   2,390.71x = 3,586.20 × 747.31
4. Step 4: Simplify right side
   2,390.71x = 2,680,003.12
5. Step 5: Solve for x
   x = 2,680,003.12/2,390.71
6. Step 6: Final answer
   x = 1,121.01