Finding the Fourth Proportional to 1,488.74, 2,054.43 and 825.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.74 : 2,054.43 = 825.59 : x
2. Step 2: Convert to fraction form
   1,488.74/2,054.43 = 825.59/x
3. Step 3: Cross multiply
   1,488.74x = 2,054.43 × 825.59
4. Step 4: Simplify right side
   1,488.74x = 1,696,102.46
5. Step 5: Solve for x
   x = 1,696,102.46/1,488.74
6. Step 6: Final answer
   x = 1,139.29