Finding the Fourth Proportional to 1,123.56, 1,548.71 and 887.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.56 : 1,548.71 = 887.11 : x
2. Step 2: Convert to fraction form
   1,123.56/1,548.71 = 887.11/x
3. Step 3: Cross multiply
   1,123.56x = 1,548.71 × 887.11
4. Step 4: Simplify right side
   1,123.56x = 1,373,876.13
5. Step 5: Solve for x
   x = 1,373,876.13/1,123.56
6. Step 6: Final answer
   x = 1,222.79