Finding the Fourth Proportional to 2,294.79, 3,443.21 and 978.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,294.79 : 3,443.21 = 978.90 : x
2. Step 2: Convert to fraction form
   2,294.79/3,443.21 = 978.90/x
3. Step 3: Cross multiply
   2,294.79x = 3,443.21 × 978.90
4. Step 4: Simplify right side
   2,294.79x = 3,370,558.27
5. Step 5: Solve for x
   x = 3,370,558.27/2,294.79
6. Step 6: Final answer
   x = 1,468.79