Finding the Fourth Proportional to 1,641.72, 2,456.46 and 981.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.72 : 2,456.46 = 981.18 : x
2. Step 2: Convert to fraction form
   1,641.72/2,456.46 = 981.18/x
3. Step 3: Cross multiply
   1,641.72x = 2,456.46 × 981.18
4. Step 4: Simplify right side
   1,641.72x = 2,410,229.42
5. Step 5: Solve for x
   x = 2,410,229.42/1,641.72
6. Step 6: Final answer
   x = 1,468.11