Finding the Fourth Proportional to 3,436.86, 4,743.21 and 2,111.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.86 : 4,743.21 = 2,111.40 : x
2. Step 2: Convert to fraction form
   3,436.86/4,743.21 = 2,111.40/x
3. Step 3: Cross multiply
   3,436.86x = 4,743.21 × 2,111.40
4. Step 4: Simplify right side
   3,436.86x = 10,014,813.59
5. Step 5: Solve for x
   x = 10,014,813.59/3,436.86
6. Step 6: Final answer
   x = 2,913.94