Finding the Fourth Proportional to 1,085.34, 1,497.76 and 613.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.34 : 1,497.76 = 613.21 : x
2. Step 2: Convert to fraction form
   1,085.34/1,497.76 = 613.21/x
3. Step 3: Cross multiply
   1,085.34x = 1,497.76 × 613.21
4. Step 4: Simplify right side
   1,085.34x = 918,442.39
5. Step 5: Solve for x
   x = 918,442.39/1,085.34
6. Step 6: Final answer
   x = 846.23