Finding the Third Proportional to 8,704.50 and 21,039.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,704.50 : 21,039.75 = 21,039.75 : x
2. Step 2: Convert to fraction form
   8,704.50/21,039.75 = 21,039.75/x
3. Step 3: Cross multiply
   8,704.50x = 21,039.75 × 21,039.75
4. Step 4: Simplify right side
   8,704.50x = 442,671,080.06
5. Step 5: Solve for x
   x = 442,671,080.06/8,704.50
6. Step 6: Final answer
   x = 50,855.43