Finding the Fourth Proportional to 1,081.57, 1,492.55 and 609.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.57 : 1,492.55 = 609.49 : x
2. Step 2: Convert to fraction form
   1,081.57/1,492.55 = 609.49/x
3. Step 3: Cross multiply
   1,081.57x = 1,492.55 × 609.49
4. Step 4: Simplify right side
   1,081.57x = 909,690.95
5. Step 5: Solve for x
   x = 909,690.95/1,081.57
6. Step 6: Final answer
   x = 841.08