Finding the Fourth Proportional to 1,123.98, 1,548.56 and 843.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.98 : 1,548.56 = 843.78 : x
2. Step 2: Convert to fraction form
   1,123.98/1,548.56 = 843.78/x
3. Step 3: Cross multiply
   1,123.98x = 1,548.56 × 843.78
4. Step 4: Simplify right side
   1,123.98x = 1,306,643.96
5. Step 5: Solve for x
   x = 1,306,643.96/1,123.98
6. Step 6: Final answer
   x = 1,162.52