Finding the Fourth Proportional to 3,868.86, 5,339.00 and 2,100.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.86 : 5,339.00 = 2,100.43 : x
2. Step 2: Convert to fraction form
   3,868.86/5,339.00 = 2,100.43/x
3. Step 3: Cross multiply
   3,868.86x = 5,339.00 × 2,100.43
4. Step 4: Simplify right side
   3,868.86x = 11,214,185.27
5. Step 5: Solve for x
   x = 11,214,185.27/3,868.86
6. Step 6: Final answer
   x = 2,898.58