Finding the Fourth Proportional to 1,488.47, 2,054.41 and 825.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.47 : 2,054.41 = 825.55 : x
2. Step 2: Convert to fraction form
   1,488.47/2,054.41 = 825.55/x
3. Step 3: Cross multiply
   1,488.47x = 2,054.41 × 825.55
4. Step 4: Simplify right side
   1,488.47x = 1,696,010.98
5. Step 5: Solve for x
   x = 1,696,010.98/1,488.47
6. Step 6: Final answer
   x = 1,139.44