Finding the Fourth Proportional to 21,046.50, 31,571.15 and 7,005.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,046.50 : 31,571.15 = 7,005.96 : x
2. Step 2: Convert to fraction form
   21,046.50/31,571.15 = 7,005.96/x
3. Step 3: Cross multiply
   21,046.50x = 31,571.15 × 7,005.96
4. Step 4: Simplify right side
   21,046.50x = 221,186,179.02
5. Step 5: Solve for x
   x = 221,186,179.02/21,046.50
6. Step 6: Final answer
   x = 10,509.40