Finding the Fourth Proportional to 2,294.29, 3,442.47 and 978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,294.29 : 3,442.47 = 978.40 : x
2. Step 2: Convert to fraction form
   2,294.29/3,442.47 = 978.40/x
3. Step 3: Cross multiply
   2,294.29x = 3,442.47 × 978.40
4. Step 4: Simplify right side
   2,294.29x = 3,368,090.54
5. Step 5: Solve for x
   x = 3,368,090.54/2,294.29
6. Step 6: Final answer
   x = 1,468.03