Finding the Fourth Proportional to 21,215.96, 31,838.46 and 10,835

Step by Step Solution

1. Step 1: Write the proportion equation
   21,215.96 : 31,838.46 = 10,835 : x
2. Step 2: Convert to fraction form
   21,215.96/31,838.46 = 10,835/x
3. Step 3: Cross multiply
   21,215.96x = 31,838.46 × 10,835
4. Step 4: Simplify right side
   21,215.96x = 344,969,714.10
5. Step 5: Solve for x
   x = 344,969,714.10/21,215.96
6. Step 6: Final answer
   x = 16,259.92