Finding the Fourth Proportional to 1,084.47, 1,496.55 and 612.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.47 : 1,496.55 = 612.39 : x
2. Step 2: Convert to fraction form
   1,084.47/1,496.55 = 612.39/x
3. Step 3: Cross multiply
   1,084.47x = 1,496.55 × 612.39
4. Step 4: Simplify right side
   1,084.47x = 916,472.25
5. Step 5: Solve for x
   x = 916,472.25/1,084.47
6. Step 6: Final answer
   x = 845.09