Finding the Fourth Proportional to 1,123.48, 1,681.61 and 602.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.48 : 1,681.61 = 602.20 : x
2. Step 2: Convert to fraction form
   1,123.48/1,681.61 = 602.20/x
3. Step 3: Cross multiply
   1,123.48x = 1,681.61 × 602.20
4. Step 4: Simplify right side
   1,123.48x = 1,012,658.64
5. Step 5: Solve for x
   x = 1,012,658.64/1,123.48
6. Step 6: Final answer
   x = 901.36