Finding the Fourth Proportional to 1,489.82, 2,055.06 and 985.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.82 : 2,055.06 = 985.69 : x
2. Step 2: Convert to fraction form
   1,489.82/2,055.06 = 985.69/x
3. Step 3: Cross multiply
   1,489.82x = 2,055.06 × 985.69
4. Step 4: Simplify right side
   1,489.82x = 2,025,641.71
5. Step 5: Solve for x
   x = 2,025,641.71/1,489.82
6. Step 6: Final answer
   x = 1,359.65