Finding the Fourth Proportional to 1,782.35, 2,686.89 and 1,663.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.35 : 2,686.89 = 1,663.42 : x
2. Step 2: Convert to fraction form
   1,782.35/2,686.89 = 1,663.42/x
3. Step 3: Cross multiply
   1,782.35x = 2,686.89 × 1,663.42
4. Step 4: Simplify right side
   1,782.35x = 4,469,426.56
5. Step 5: Solve for x
   x = 4,469,426.56/1,782.35
6. Step 6: Final answer
   x = 2,507.60