Finding the Fourth Proportional to 1,081.38, 1,492.25 and 609.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.38 : 1,492.25 = 609.29 : x
2. Step 2: Convert to fraction form
   1,081.38/1,492.25 = 609.29/x
3. Step 3: Cross multiply
   1,081.38x = 1,492.25 × 609.29
4. Step 4: Simplify right side
   1,081.38x = 909,213.00
5. Step 5: Solve for x
   x = 909,213.00/1,081.38
6. Step 6: Final answer
   x = 840.79