Finding the Fourth Proportional to 1,083.18, 1,621.98 and 716.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.18 : 1,621.98 = 716.82 : x
2. Step 2: Convert to fraction form
   1,083.18/1,621.98 = 716.82/x
3. Step 3: Cross multiply
   1,083.18x = 1,621.98 × 716.82
4. Step 4: Simplify right side
   1,083.18x = 1,162,667.70
5. Step 5: Solve for x
   x = 1,162,667.70/1,083.18
6. Step 6: Final answer
   x = 1,073.38