Finding the Fourth Proportional to 2,074.34, 3,110.42 and 978.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.34 : 3,110.42 = 978.41 : x
2. Step 2: Convert to fraction form
   2,074.34/3,110.42 = 978.41/x
3. Step 3: Cross multiply
   2,074.34x = 3,110.42 × 978.41
4. Step 4: Simplify right side
   2,074.34x = 3,043,252.93
5. Step 5: Solve for x
   x = 3,043,252.93/2,074.34
6. Step 6: Final answer
   x = 1,467.10