Finding the Fourth Proportional to 1,081.34, 1,492.43 and 609.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.34 : 1,492.43 = 609.45 : x
2. Step 2: Convert to fraction form
   1,081.34/1,492.43 = 609.45/x
3. Step 3: Cross multiply
   1,081.34x = 1,492.43 × 609.45
4. Step 4: Simplify right side
   1,081.34x = 909,561.46
5. Step 5: Solve for x
   x = 909,561.46/1,081.34
6. Step 6: Final answer
   x = 841.14