Finding the Fourth Proportional to 21,215.35, 31,827.12 and 8,066.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,215.35 : 31,827.12 = 8,066.69 : x
2. Step 2: Convert to fraction form
   21,215.35/31,827.12 = 8,066.69/x
3. Step 3: Cross multiply
   21,215.35x = 31,827.12 × 8,066.69
4. Step 4: Simplify right side
   21,215.35x = 256,739,665.00
5. Step 5: Solve for x
   x = 256,739,665.00/21,215.35
6. Step 6: Final answer
   x = 12,101.60