Finding the Fourth Proportional to 21,123.04, 31,680.52 and 6,331.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.04 : 31,680.52 = 6,331.96 : x
2. Step 2: Convert to fraction form
   21,123.04/31,680.52 = 6,331.96/x
3. Step 3: Cross multiply
   21,123.04x = 31,680.52 × 6,331.96
4. Step 4: Simplify right side
   21,123.04x = 200,599,595.36
5. Step 5: Solve for x
   x = 200,599,595.36/21,123.04
6. Step 6: Final answer
   x = 9,496.72