Finding the Fourth Proportional to 1,488.89, 2,055.61 and 958.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.89 : 2,055.61 = 958.70 : x
2. Step 2: Convert to fraction form
   1,488.89/2,055.61 = 958.70/x
3. Step 3: Cross multiply
   1,488.89x = 2,055.61 × 958.70
4. Step 4: Simplify right side
   1,488.89x = 1,970,708.34
5. Step 5: Solve for x
   x = 1,970,708.34/1,488.89
6. Step 6: Final answer
   x = 1,323.61