Finding the Fourth Proportional to 3,521.31, 4,857.89 and 2,123.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521.31 : 4,857.89 = 2,123.25 : x
2. Step 2: Convert to fraction form
   3,521.31/4,857.89 = 2,123.25/x
3. Step 3: Cross multiply
   3,521.31x = 4,857.89 × 2,123.25
4. Step 4: Simplify right side
   3,521.31x = 10,314,504.33
5. Step 5: Solve for x
   x = 10,314,504.33/3,521.31
6. Step 6: Final answer
   x = 2,929.17