Finding the Fourth Proportional to 1,612.32, 2,223.68 and 1,081.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.32 : 2,223.68 = 1,081.29 : x
2. Step 2: Convert to fraction form
   1,612.32/2,223.68 = 1,081.29/x
3. Step 3: Cross multiply
   1,612.32x = 2,223.68 × 1,081.29
4. Step 4: Simplify right side
   1,612.32x = 2,404,442.95
5. Step 5: Solve for x
   x = 2,404,442.95/1,612.32
6. Step 6: Final answer
   x = 1,491.29