Finding the Fourth Proportional to 2,086.79, 2,878.49 and 1,637.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.79 : 2,878.49 = 1,637.98 : x
2. Step 2: Convert to fraction form
   2,086.79/2,878.49 = 1,637.98/x
3. Step 3: Cross multiply
   2,086.79x = 2,878.49 × 1,637.98
4. Step 4: Simplify right side
   2,086.79x = 4,714,900.86
5. Step 5: Solve for x
   x = 4,714,900.86/2,086.79
6. Step 6: Final answer
   x = 2,259.41