Finding the Fourth Proportional to 1,622.31, 2,238.79 and 923.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.31 : 2,238.79 = 923.82 : x
2. Step 2: Convert to fraction form
   1,622.31/2,238.79 = 923.82/x
3. Step 3: Cross multiply
   1,622.31x = 2,238.79 × 923.82
4. Step 4: Simplify right side
   1,622.31x = 2,068,246.88
5. Step 5: Solve for x
   x = 2,068,246.88/1,622.31
6. Step 6: Final answer
   x = 1,274.88