Finding the Fourth Proportional to 1,123.80, 1,682.10 and 602.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.80 : 1,682.10 = 602.50 : x
2. Step 2: Convert to fraction form
   1,123.80/1,682.10 = 602.50/x
3. Step 3: Cross multiply
   1,123.80x = 1,682.10 × 602.50
4. Step 4: Simplify right side
   1,123.80x = 1,013,465.25
5. Step 5: Solve for x
   x = 1,013,465.25/1,123.80
6. Step 6: Final answer
   x = 901.82