Finding the Fourth Proportional to 2,887.30, 3,983.83 and 2,215.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.30 : 3,983.83 = 2,215.86 : x
2. Step 2: Convert to fraction form
   2,887.30/3,983.83 = 2,215.86/x
3. Step 3: Cross multiply
   2,887.30x = 3,983.83 × 2,215.86
4. Step 4: Simplify right side
   2,887.30x = 8,827,601.53
5. Step 5: Solve for x
   x = 8,827,601.53/2,887.30
6. Step 6: Final answer
   x = 3,057.39