Finding the Fourth Proportional to 1,081.89, 1,493.04 and 609.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.89 : 1,493.04 = 609.80 : x
2. Step 2: Convert to fraction form
   1,081.89/1,493.04 = 609.80/x
3. Step 3: Cross multiply
   1,081.89x = 1,493.04 × 609.80
4. Step 4: Simplify right side
   1,081.89x = 910,459.52
5. Step 5: Solve for x
   x = 910,459.52/1,081.89
6. Step 6: Final answer
   x = 841.55