Finding the Fourth Proportional to 2,278.28, 3,142.76 and 1,570.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.28 : 3,142.76 = 1,570.04 : x
2. Step 2: Convert to fraction form
   2,278.28/3,142.76 = 1,570.04/x
3. Step 3: Cross multiply
   2,278.28x = 3,142.76 × 1,570.04
4. Step 4: Simplify right side
   2,278.28x = 4,934,258.91
5. Step 5: Solve for x
   x = 4,934,258.91/2,278.28
6. Step 6: Final answer
   x = 2,165.78