Finding the Fourth Proportional to 1,275.72, 1,909.60 and 982.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.72 : 1,909.60 = 982.46 : x
2. Step 2: Convert to fraction form
   1,275.72/1,909.60 = 982.46/x
3. Step 3: Cross multiply
   1,275.72x = 1,909.60 × 982.46
4. Step 4: Simplify right side
   1,275.72x = 1,876,111.62
5. Step 5: Solve for x
   x = 1,876,111.62/1,275.72
6. Step 6: Final answer
   x = 1,470.63