Finding the Fourth Proportional to 1,478.17, 2,040.60 and 954.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.17 : 2,040.60 = 954.55 : x
2. Step 2: Convert to fraction form
   1,478.17/2,040.60 = 954.55/x
3. Step 3: Cross multiply
   1,478.17x = 2,040.60 × 954.55
4. Step 4: Simplify right side
   1,478.17x = 1,947,854.73
5. Step 5: Solve for x
   x = 1,947,854.73/1,478.17
6. Step 6: Final answer
   x = 1,317.75