Finding the Fourth Proportional to 1,488.88, 2,054.67 and 825.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.88 : 2,054.67 = 825.69 : x
2. Step 2: Convert to fraction form
   1,488.88/2,054.67 = 825.69/x
3. Step 3: Cross multiply
   1,488.88x = 2,054.67 × 825.69
4. Step 4: Simplify right side
   1,488.88x = 1,696,525.08
5. Step 5: Solve for x
   x = 1,696,525.08/1,488.88
6. Step 6: Final answer
   x = 1,139.46