Finding the Fourth Proportional to 1,081.71, 1,492.69 and 609.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.71 : 1,492.69 = 609.63 : x
2. Step 2: Convert to fraction form
   1,081.71/1,492.69 = 609.63/x
3. Step 3: Cross multiply
   1,081.71x = 1,492.69 × 609.63
4. Step 4: Simplify right side
   1,081.71x = 909,988.60
5. Step 5: Solve for x
   x = 909,988.60/1,081.71
6. Step 6: Final answer
   x = 841.25