Finding the Fourth Proportional to 1,488.74, 2,054.39 and 825.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.74 : 2,054.39 = 825.58 : x
2. Step 2: Convert to fraction form
   1,488.74/2,054.39 = 825.58/x
3. Step 3: Cross multiply
   1,488.74x = 2,054.39 × 825.58
4. Step 4: Simplify right side
   1,488.74x = 1,696,052.50
5. Step 5: Solve for x
   x = 1,696,052.50/1,488.74
6. Step 6: Final answer
   x = 1,139.26