Finding the Fourth Proportional to 2,275.10, 3,412.82 and 631.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.10 : 3,412.82 = 631.78 : x
2. Step 2: Convert to fraction form
   2,275.10/3,412.82 = 631.78/x
3. Step 3: Cross multiply
   2,275.10x = 3,412.82 × 631.78
4. Step 4: Simplify right side
   2,275.10x = 2,156,151.42
5. Step 5: Solve for x
   x = 2,156,151.42/2,275.10
6. Step 6: Final answer
   x = 947.72