Finding the Fourth Proportional to 1,081.36, 1,492.01 and 609.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.36 : 1,492.01 = 609.29 : x
2. Step 2: Convert to fraction form
   1,081.36/1,492.01 = 609.29/x
3. Step 3: Cross multiply
   1,081.36x = 1,492.01 × 609.29
4. Step 4: Simplify right side
   1,081.36x = 909,059.31
5. Step 5: Solve for x
   x = 909,059.31/1,081.36
6. Step 6: Final answer
   x = 840.67