Finding the Fourth Proportional to 1,123.01, 1,687.55 and 603.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.01 : 1,687.55 = 603.39 : x
2. Step 2: Convert to fraction form
   1,123.01/1,687.55 = 603.39/x
3. Step 3: Cross multiply
   1,123.01x = 1,687.55 × 603.39
4. Step 4: Simplify right side
   1,123.01x = 1,018,247.78
5. Step 5: Solve for x
   x = 1,018,247.78/1,123.01
6. Step 6: Final answer
   x = 906.72