Finding the Fourth Proportional to 1,451.76, 2,180.61 and 958.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.76 : 2,180.61 = 958.89 : x
2. Step 2: Convert to fraction form
   1,451.76/2,180.61 = 958.89/x
3. Step 3: Cross multiply
   1,451.76x = 2,180.61 × 958.89
4. Step 4: Simplify right side
   1,451.76x = 2,090,949.43
5. Step 5: Solve for x
   x = 2,090,949.43/1,451.76
6. Step 6: Final answer
   x = 1,440.29