Finding the Fourth Proportional to 3,216.57, 4,832.16 and 2,123.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,216.57 : 4,832.16 = 2,123.07 : x
2. Step 2: Convert to fraction form
   3,216.57/4,832.16 = 2,123.07/x
3. Step 3: Cross multiply
   3,216.57x = 4,832.16 × 2,123.07
4. Step 4: Simplify right side
   3,216.57x = 10,259,013.93
5. Step 5: Solve for x
   x = 10,259,013.93/3,216.57
6. Step 6: Final answer
   x = 3,189.43