Finding the Fourth Proportional to 2,074.14, 3,112.29 and 978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.14 : 3,112.29 = 978.30 : x
2. Step 2: Convert to fraction form
   2,074.14/3,112.29 = 978.30/x
3. Step 3: Cross multiply
   2,074.14x = 3,112.29 × 978.30
4. Step 4: Simplify right side
   2,074.14x = 3,044,753.31
5. Step 5: Solve for x
   x = 3,044,753.31/2,074.14
6. Step 6: Final answer
   x = 1,467.96