Finding the Fourth Proportional to 3,445.52, 5,168.34 and 980.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,445.52 : 5,168.34 = 980.40 : x
2. Step 2: Convert to fraction form
   3,445.52/5,168.34 = 980.40/x
3. Step 3: Cross multiply
   3,445.52x = 5,168.34 × 980.40
4. Step 4: Simplify right side
   3,445.52x = 5,067,040.54
5. Step 5: Solve for x
   x = 5,067,040.54/3,445.52
6. Step 6: Final answer
   x = 1,470.62