Finding the Fourth Proportional to 3,445.28, 5,168.16 and 980.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,445.28 : 5,168.16 = 980.30 : x
2. Step 2: Convert to fraction form
   3,445.28/5,168.16 = 980.30/x
3. Step 3: Cross multiply
   3,445.28x = 5,168.16 × 980.30
4. Step 4: Simplify right side
   3,445.28x = 5,066,321.41
5. Step 5: Solve for x
   x = 5,066,321.41/3,445.28
6. Step 6: Final answer
   x = 1,470.51