Finding the Fourth Proportional to 3,456.09, 4,767.76 and 2,129.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.09 : 4,767.76 = 2,129.31 : x
2. Step 2: Convert to fraction form
   3,456.09/4,767.76 = 2,129.31/x
3. Step 3: Cross multiply
   3,456.09x = 4,767.76 × 2,129.31
4. Step 4: Simplify right side
   3,456.09x = 10,152,039.05
5. Step 5: Solve for x
   x = 10,152,039.05/3,456.09
6. Step 6: Final answer
   x = 2,937.43