Finding the Fourth Proportional to 2,574.81, 3,862.62 and 931.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.81 : 3,862.62 = 931.46 : x
2. Step 2: Convert to fraction form
   2,574.81/3,862.62 = 931.46/x
3. Step 3: Cross multiply
   2,574.81x = 3,862.62 × 931.46
4. Step 4: Simplify right side
   2,574.81x = 3,597,856.71
5. Step 5: Solve for x
   x = 3,597,856.71/2,574.81
6. Step 6: Final answer
   x = 1,397.33