Finding the Fourth Proportional to 2,286.86, 3,152.99 and 1,866.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.86 : 3,152.99 = 1,866.78 : x
2. Step 2: Convert to fraction form
   2,286.86/3,152.99 = 1,866.78/x
3. Step 3: Cross multiply
   2,286.86x = 3,152.99 × 1,866.78
4. Step 4: Simplify right side
   2,286.86x = 5,885,943.34
5. Step 5: Solve for x
   x = 5,885,943.34/2,286.86
6. Step 6: Final answer
   x = 2,573.82