Finding the Fourth Proportional to 1,622.34, 2,431.17 and 881.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.34 : 2,431.17 = 881.33 : x
2. Step 2: Convert to fraction form
   1,622.34/2,431.17 = 881.33/x
3. Step 3: Cross multiply
   1,622.34x = 2,431.17 × 881.33
4. Step 4: Simplify right side
   1,622.34x = 2,142,650.90
5. Step 5: Solve for x
   x = 2,142,650.90/1,622.34
6. Step 6: Final answer
   x = 1,320.72