Finding the Fourth Proportional to 1,535.92, 2,298.72 and 980.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.92 : 2,298.72 = 980.40 : x
2. Step 2: Convert to fraction form
   1,535.92/2,298.72 = 980.40/x
3. Step 3: Cross multiply
   1,535.92x = 2,298.72 × 980.40
4. Step 4: Simplify right side
   1,535.92x = 2,253,665.09
5. Step 5: Solve for x
   x = 2,253,665.09/1,535.92
6. Step 6: Final answer
   x = 1,467.31