Finding the Fourth Proportional to 2,871.30, 4,308.15 and 924.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.30 : 4,308.15 = 924.10 : x
2. Step 2: Convert to fraction form
   2,871.30/4,308.15 = 924.10/x
3. Step 3: Cross multiply
   2,871.30x = 4,308.15 × 924.10
4. Step 4: Simplify right side
   2,871.30x = 3,981,161.42
5. Step 5: Solve for x
   x = 3,981,161.42/2,871.30
6. Step 6: Final answer
   x = 1,386.54