Finding the Third Proportional to 10,109.18 and 20,713.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,109.18 : 20,713.85 = 20,713.85 : x
2. Step 2: Convert to fraction form
   10,109.18/20,713.85 = 20,713.85/x
3. Step 3: Cross multiply
   10,109.18x = 20,713.85 × 20,713.85
4. Step 4: Simplify right side
   10,109.18x = 429,063,646.55
5. Step 5: Solve for x
   x = 429,063,646.55/10,109.18
6. Step 6: Final answer
   x = 42,442.97