Finding the Fourth Proportional to 3,123.47, 4,308.86 and 1,863.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.47 : 4,308.86 = 1,863.69 : x
2. Step 2: Convert to fraction form
   3,123.47/4,308.86 = 1,863.69/x
3. Step 3: Cross multiply
   3,123.47x = 4,308.86 × 1,863.69
4. Step 4: Simplify right side
   3,123.47x = 8,030,369.97
5. Step 5: Solve for x
   x = 8,030,369.97/3,123.47
6. Step 6: Final answer
   x = 2,570.98