Finding the Fourth Proportional to 2,315.46, 3,472.90 and 928.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.46 : 3,472.90 = 928.74 : x
2. Step 2: Convert to fraction form
   2,315.46/3,472.90 = 928.74/x
3. Step 3: Cross multiply
   2,315.46x = 3,472.90 × 928.74
4. Step 4: Simplify right side
   2,315.46x = 3,225,421.15
5. Step 5: Solve for x
   x = 3,225,421.15/2,315.46
6. Step 6: Final answer
   x = 1,392.99