Finding the Fourth Proportional to 1,349.55, 2,019.50 and 979.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.55 : 2,019.50 = 979.78 : x
2. Step 2: Convert to fraction form
   1,349.55/2,019.50 = 979.78/x
3. Step 3: Cross multiply
   1,349.55x = 2,019.50 × 979.78
4. Step 4: Simplify right side
   1,349.55x = 1,978,665.71
5. Step 5: Solve for x
   x = 1,978,665.71/1,349.55
6. Step 6: Final answer
   x = 1,466.17