Finding the Fourth Proportional to 1,622.17, 2,238.65 and 923.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.17 : 2,238.65 = 923.59 : x
2. Step 2: Convert to fraction form
   1,622.17/2,238.65 = 923.59/x
3. Step 3: Cross multiply
   1,622.17x = 2,238.65 × 923.59
4. Step 4: Simplify right side
   1,622.17x = 2,067,594.75
5. Step 5: Solve for x
   x = 2,067,594.75/1,622.17
6. Step 6: Final answer
   x = 1,274.59