Finding the Fourth Proportional to 2,177.89, 3,002.87 and 1,863.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,177.89 : 3,002.87 = 1,863.81 : x
2. Step 2: Convert to fraction form
   2,177.89/3,002.87 = 1,863.81/x
3. Step 3: Cross multiply
   2,177.89x = 3,002.87 × 1,863.81
4. Step 4: Simplify right side
   2,177.89x = 5,596,783.79
5. Step 5: Solve for x
   x = 5,596,783.79/2,177.89
6. Step 6: Final answer
   x = 2,569.82