Finding the Fourth Proportional to 1,622.18, 2,238.60 and 923.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.18 : 2,238.60 = 923.55 : x
2. Step 2: Convert to fraction form
   1,622.18/2,238.60 = 923.55/x
3. Step 3: Cross multiply
   1,622.18x = 2,238.60 × 923.55
4. Step 4: Simplify right side
   1,622.18x = 2,067,459.03
5. Step 5: Solve for x
   x = 2,067,459.03/1,622.18
6. Step 6: Final answer
   x = 1,274.50