Finding the Fourth Proportional to 1,653.18, 2,280.81 and 980.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,653.18 : 2,280.81 = 980.83 : x
2. Step 2: Convert to fraction form
   1,653.18/2,280.81 = 980.83/x
3. Step 3: Cross multiply
   1,653.18x = 2,280.81 × 980.83
4. Step 4: Simplify right side
   1,653.18x = 2,237,075.47
5. Step 5: Solve for x
   x = 2,237,075.47/1,653.18
6. Step 6: Final answer
   x = 1,353.20