Finding the Third Proportional to 16,499.63 and 21,878.63

Step by Step Solution

1. Step 1: Write the proportion equation
   16,499.63 : 21,878.63 = 21,878.63 : x
2. Step 2: Convert to fraction form
   16,499.63/21,878.63 = 21,878.63/x
3. Step 3: Cross multiply
   16,499.63x = 21,878.63 × 21,878.63
4. Step 4: Simplify right side
   16,499.63x = 478,674,231.89
5. Step 5: Solve for x
   x = 478,674,231.89/16,499.63
6. Step 6: Final answer
   x = 29,011.22