Finding the Fourth Proportional to 1,489.62, 2,055.89 and 930.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.62 : 2,055.89 = 930.69 : x
2. Step 2: Convert to fraction form
   1,489.62/2,055.89 = 930.69/x
3. Step 3: Cross multiply
   1,489.62x = 2,055.89 × 930.69
4. Step 4: Simplify right side
   1,489.62x = 1,913,391.61
5. Step 5: Solve for x
   x = 1,913,391.61/1,489.62
6. Step 6: Final answer
   x = 1,284.48