Finding the Fourth Proportional to 2,047.86, 3,086.78 and 1,872.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,047.86 : 3,086.78 = 1,872.57 : x
2. Step 2: Convert to fraction form
   2,047.86/3,086.78 = 1,872.57/x
3. Step 3: Cross multiply
   2,047.86x = 3,086.78 × 1,872.57
4. Step 4: Simplify right side
   2,047.86x = 5,780,202.26
5. Step 5: Solve for x
   x = 5,780,202.26/2,047.86
6. Step 6: Final answer
   x = 2,822.56