Finding the Fourth Proportional to 1,081.80, 1,492.79 and 609.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.80 : 1,492.79 = 609.67 : x
2. Step 2: Convert to fraction form
   1,081.80/1,492.79 = 609.67/x
3. Step 3: Cross multiply
   1,081.80x = 1,492.79 × 609.67
4. Step 4: Simplify right side
   1,081.80x = 910,109.28
5. Step 5: Solve for x
   x = 910,109.28/1,081.80
6. Step 6: Final answer
   x = 841.29