Finding the Fourth Proportional to 3,672.11, 5,067.78 and 2,100.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672.11 : 5,067.78 = 2,100.17 : x
2. Step 2: Convert to fraction form
   3,672.11/5,067.78 = 2,100.17/x
3. Step 3: Cross multiply
   3,672.11x = 5,067.78 × 2,100.17
4. Step 4: Simplify right side
   3,672.11x = 10,643,199.52
5. Step 5: Solve for x
   x = 10,643,199.52/3,672.11
6. Step 6: Final answer
   x = 2,898.39