Finding the Fourth Proportional to 1,096.56, 1,642.41 and 609.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.56 : 1,642.41 = 609.30 : x
2. Step 2: Convert to fraction form
   1,096.56/1,642.41 = 609.30/x
3. Step 3: Cross multiply
   1,096.56x = 1,642.41 × 609.30
4. Step 4: Simplify right side
   1,096.56x = 1,000,720.41
5. Step 5: Solve for x
   x = 1,000,720.41/1,096.56
6. Step 6: Final answer
   x = 912.60