Finding the Fourth Proportional to 1,557.73, 2,149.57 and 928.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.73 : 2,149.57 = 928.53 : x
2. Step 2: Convert to fraction form
   1,557.73/2,149.57 = 928.53/x
3. Step 3: Cross multiply
   1,557.73x = 2,149.57 × 928.53
4. Step 4: Simplify right side
   1,557.73x = 1,995,941.39
5. Step 5: Solve for x
   x = 1,995,941.39/1,557.73
6. Step 6: Final answer
   x = 1,281.31