Finding the Fourth Proportional to 1,671.78, 2,308.77 and 1,411.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.78 : 2,308.77 = 1,411.86 : x
2. Step 2: Convert to fraction form
   1,671.78/2,308.77 = 1,411.86/x
3. Step 3: Cross multiply
   1,671.78x = 2,308.77 × 1,411.86
4. Step 4: Simplify right side
   1,671.78x = 3,259,660.01
5. Step 5: Solve for x
   x = 3,259,660.01/1,671.78
6. Step 6: Final answer
   x = 1,949.81