Finding the Fourth Proportional to 3,280.06, 4,921.53 and 1,089.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,280.06 : 4,921.53 = 1,089.10 : x
2. Step 2: Convert to fraction form
   3,280.06/4,921.53 = 1,089.10/x
3. Step 3: Cross multiply
   3,280.06x = 4,921.53 × 1,089.10
4. Step 4: Simplify right side
   3,280.06x = 5,360,038.32
5. Step 5: Solve for x
   x = 5,360,038.32/3,280.06
6. Step 6: Final answer
   x = 1,634.13