Finding the Fourth Proportional to 1,073.20, 1,479.98 and 955.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.20 : 1,479.98 = 955.30 : x
2. Step 2: Convert to fraction form
   1,073.20/1,479.98 = 955.30/x
3. Step 3: Cross multiply
   1,073.20x = 1,479.98 × 955.30
4. Step 4: Simplify right side
   1,073.20x = 1,413,824.89
5. Step 5: Solve for x
   x = 1,413,824.89/1,073.20
6. Step 6: Final answer
   x = 1,317.39