Finding the Fourth Proportional to 21,734.62, 29,992.72 and 13,349.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,734.62 : 29,992.72 = 13,349.50 : x
2. Step 2: Convert to fraction form
   21,734.62/29,992.72 = 13,349.50/x
3. Step 3: Cross multiply
   21,734.62x = 29,992.72 × 13,349.50
4. Step 4: Simplify right side
   21,734.62x = 400,387,815.64
5. Step 5: Solve for x
   x = 400,387,815.64/21,734.62
6. Step 6: Final answer
   x = 18,421.66