Finding the Fourth Proportional to 2,073.74, 3,111.96 and 978.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.74 : 3,111.96 = 978.41 : x
2. Step 2: Convert to fraction form
   2,073.74/3,111.96 = 978.41/x
3. Step 3: Cross multiply
   2,073.74x = 3,111.96 × 978.41
4. Step 4: Simplify right side
   2,073.74x = 3,044,772.78
5. Step 5: Solve for x
   x = 3,044,772.78/2,073.74
6. Step 6: Final answer
   x = 1,468.25