Finding the Fourth Proportional to 1,476.20, 2,036.22 and 978.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,476.20 : 2,036.22 = 978.65 : x
2. Step 2: Convert to fraction form
   1,476.20/2,036.22 = 978.65/x
3. Step 3: Cross multiply
   1,476.20x = 2,036.22 × 978.65
4. Step 4: Simplify right side
   1,476.20x = 1,992,736.52
5. Step 5: Solve for x
   x = 1,992,736.52/1,476.20
6. Step 6: Final answer
   x = 1,349.91