Finding the Fourth Proportional to 3,445.40, 5,167.55 and 979.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,445.40 : 5,167.55 = 979.61 : x
2. Step 2: Convert to fraction form
   3,445.40/5,167.55 = 979.61/x
3. Step 3: Cross multiply
   3,445.40x = 5,167.55 × 979.61
4. Step 4: Simplify right side
   3,445.40x = 5,062,152.92
5. Step 5: Solve for x
   x = 5,062,152.92/3,445.40
6. Step 6: Final answer
   x = 1,469.25