Finding the Fourth Proportional to 1,646.72, 2,471.76 and 1,285.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.72 : 2,471.76 = 1,285.52 : x
2. Step 2: Convert to fraction form
   1,646.72/2,471.76 = 1,285.52/x
3. Step 3: Cross multiply
   1,646.72x = 2,471.76 × 1,285.52
4. Step 4: Simplify right side
   1,646.72x = 3,177,496.92
5. Step 5: Solve for x
   x = 3,177,496.92/1,646.72
6. Step 6: Final answer
   x = 1,929.59