Finding the Fourth Proportional to 1,488.89, 2,054.74 and 825.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.89 : 2,054.74 = 825.71 : x
2. Step 2: Convert to fraction form
   1,488.89/2,054.74 = 825.71/x
3. Step 3: Cross multiply
   1,488.89x = 2,054.74 × 825.71
4. Step 4: Simplify right side
   1,488.89x = 1,696,613.79
5. Step 5: Solve for x
   x = 1,696,613.79/1,488.89
6. Step 6: Final answer
   x = 1,139.51