Finding the Fourth Proportional to 3,887.10, 5,364.31 and 2,118.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,887.10 : 5,364.31 = 2,118.82 : x
2. Step 2: Convert to fraction form
   3,887.10/5,364.31 = 2,118.82/x
3. Step 3: Cross multiply
   3,887.10x = 5,364.31 × 2,118.82
4. Step 4: Simplify right side
   3,887.10x = 11,366,007.31
5. Step 5: Solve for x
   x = 11,366,007.31/3,887.10
6. Step 6: Final answer
   x = 2,924.03