Finding the Third Proportional to 15,607.69 and 20,811.94

Step by Step Solution

1. Step 1: Write the proportion equation
   15,607.69 : 20,811.94 = 20,811.94 : x
2. Step 2: Convert to fraction form
   15,607.69/20,811.94 = 20,811.94/x
3. Step 3: Cross multiply
   15,607.69x = 20,811.94 × 20,811.94
4. Step 4: Simplify right side
   15,607.69x = 433,136,742.50
5. Step 5: Solve for x
   x = 433,136,742.50/15,607.69
6. Step 6: Final answer
   x = 27,751.50