Finding the Fourth Proportional to 1,081.31, 1,622.27 and 587.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.31 : 1,622.27 = 587.61 : x
2. Step 2: Convert to fraction form
   1,081.31/1,622.27 = 587.61/x
3. Step 3: Cross multiply
   1,081.31x = 1,622.27 × 587.61
4. Step 4: Simplify right side
   1,081.31x = 953,263.54
5. Step 5: Solve for x
   x = 953,263.54/1,081.31
6. Step 6: Final answer
   x = 881.59