Finding the Fourth Proportional to 21,272.72, 29,354.63 and 12,320.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,272.72 : 29,354.63 = 12,320.82 : x
2. Step 2: Convert to fraction form
   21,272.72/29,354.63 = 12,320.82/x
3. Step 3: Cross multiply
   21,272.72x = 29,354.63 × 12,320.82
4. Step 4: Simplify right side
   21,272.72x = 361,673,050.79
5. Step 5: Solve for x
   x = 361,673,050.79/21,272.72
6. Step 6: Final answer
   x = 17,001.73