Finding the Fourth Proportional to 1,648.72, 2,470.34 and 1,160.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,470.34 = 1,160.75 : x
2. Step 2: Convert to fraction form
   1,648.72/2,470.34 = 1,160.75/x
3. Step 3: Cross multiply
   1,648.72x = 2,470.34 × 1,160.75
4. Step 4: Simplify right side
   1,648.72x = 2,867,434.80
5. Step 5: Solve for x
   x = 2,867,434.80/1,648.72
6. Step 6: Final answer
   x = 1,739.19