Finding the Fourth Proportional to 1,085.50, 1,497.82 and 613.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.50 : 1,497.82 = 613.31 : x
2. Step 2: Convert to fraction form
   1,085.50/1,497.82 = 613.31/x
3. Step 3: Cross multiply
   1,085.50x = 1,497.82 × 613.31
4. Step 4: Simplify right side
   1,085.50x = 918,627.98
5. Step 5: Solve for x
   x = 918,627.98/1,085.50
6. Step 6: Final answer
   x = 846.27