Finding the Fourth Proportional to 1,488.87, 2,054.64 and 825.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.87 : 2,054.64 = 825.73 : x
2. Step 2: Convert to fraction form
   1,488.87/2,054.64 = 825.73/x
3. Step 3: Cross multiply
   1,488.87x = 2,054.64 × 825.73
4. Step 4: Simplify right side
   1,488.87x = 1,696,577.89
5. Step 5: Solve for x
   x = 1,696,577.89/1,488.87
6. Step 6: Final answer
   x = 1,139.51