Finding the Fourth Proportional to 1,449.06, 2,171.36 and 978.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.06 : 2,171.36 = 978.69 : x
2. Step 2: Convert to fraction form
   1,449.06/2,171.36 = 978.69/x
3. Step 3: Cross multiply
   1,449.06x = 2,171.36 × 978.69
4. Step 4: Simplify right side
   1,449.06x = 2,125,091.30
5. Step 5: Solve for x
   x = 2,125,091.30/1,449.06
6. Step 6: Final answer
   x = 1,466.53