Finding the Third Proportional to 15,908.91 and 21,672.56

Step by Step Solution

1. Step 1: Write the proportion equation
   15,908.91 : 21,672.56 = 21,672.56 : x
2. Step 2: Convert to fraction form
   15,908.91/21,672.56 = 21,672.56/x
3. Step 3: Cross multiply
   15,908.91x = 21,672.56 × 21,672.56
4. Step 4: Simplify right side
   15,908.91x = 469,699,965.32
5. Step 5: Solve for x
   x = 469,699,965.32/15,908.91
6. Step 6: Final answer
   x = 29,524.34