Finding the Fourth Proportional to 1,475.31, 2,036.78 and 978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,475.31 : 2,036.78 = 978.63 : x
2. Step 2: Convert to fraction form
   1,475.31/2,036.78 = 978.63/x
3. Step 3: Cross multiply
   1,475.31x = 2,036.78 × 978.63
4. Step 4: Simplify right side
   1,475.31x = 1,993,249.12
5. Step 5: Solve for x
   x = 1,993,249.12/1,475.31
6. Step 6: Final answer
   x = 1,351.07