Finding the Fourth Proportional to 2,170.27, 3,254.72 and 783.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.27 : 3,254.72 = 783.42 : x
2. Step 2: Convert to fraction form
   2,170.27/3,254.72 = 783.42/x
3. Step 3: Cross multiply
   2,170.27x = 3,254.72 × 783.42
4. Step 4: Simplify right side
   2,170.27x = 2,549,821.54
5. Step 5: Solve for x
   x = 2,549,821.54/2,170.27
6. Step 6: Final answer
   x = 1,174.89