Finding the Fourth Proportional to 2,315.04, 3,470.43 and 852.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.04 : 3,470.43 = 852.78 : x
2. Step 2: Convert to fraction form
   2,315.04/3,470.43 = 852.78/x
3. Step 3: Cross multiply
   2,315.04x = 3,470.43 × 852.78
4. Step 4: Simplify right side
   2,315.04x = 2,959,513.30
5. Step 5: Solve for x
   x = 2,959,513.30/2,315.04
6. Step 6: Final answer
   x = 1,278.39