Finding the Fourth Proportional to 1,081.07, 1,492.04 and 609.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.07 : 1,492.04 = 609.01 : x
2. Step 2: Convert to fraction form
   1,081.07/1,492.04 = 609.01/x
3. Step 3: Cross multiply
   1,081.07x = 1,492.04 × 609.01
4. Step 4: Simplify right side
   1,081.07x = 908,667.28
5. Step 5: Solve for x
   x = 908,667.28/1,081.07
6. Step 6: Final answer
   x = 840.53