Finding the Fourth Proportional to 1,642.37, 2,465.17 and 1,123.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.37 : 2,465.17 = 1,123.16 : x
2. Step 2: Convert to fraction form
   1,642.37/2,465.17 = 1,123.16/x
3. Step 3: Cross multiply
   1,642.37x = 2,465.17 × 1,123.16
4. Step 4: Simplify right side
   1,642.37x = 2,768,765.20
5. Step 5: Solve for x
   x = 2,768,765.20/1,642.37
6. Step 6: Final answer
   x = 1,685.84