Finding the Third Proportional to 10,509.45 and 20,726.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,509.45 : 20,726.98 = 20,726.98 : x
2. Step 2: Convert to fraction form
   10,509.45/20,726.98 = 20,726.98/x
3. Step 3: Cross multiply
   10,509.45x = 20,726.98 × 20,726.98
4. Step 4: Simplify right side
   10,509.45x = 429,607,595.37
5. Step 5: Solve for x
   x = 429,607,595.37/10,509.45
6. Step 6: Final answer
   x = 40,878.21