Finding the Fourth Proportional to 1,124.88, 1,551.31 and 885.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.88 : 1,551.31 = 885.71 : x
2. Step 2: Convert to fraction form
   1,124.88/1,551.31 = 885.71/x
3. Step 3: Cross multiply
   1,124.88x = 1,551.31 × 885.71
4. Step 4: Simplify right side
   1,124.88x = 1,374,010.78
5. Step 5: Solve for x
   x = 1,374,010.78/1,124.88
6. Step 6: Final answer
   x = 1,221.47