Finding the Fourth Proportional to 1,075.50, 1,484.22 and 609.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.50 : 1,484.22 = 609.90 : x
2. Step 2: Convert to fraction form
   1,075.50/1,484.22 = 609.90/x
3. Step 3: Cross multiply
   1,075.50x = 1,484.22 × 609.90
4. Step 4: Simplify right side
   1,075.50x = 905,225.78
5. Step 5: Solve for x
   x = 905,225.78/1,075.50
6. Step 6: Final answer
   x = 841.68