Finding the Third Proportional to 13,672.55 and 20,700.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,672.55 : 20,700.56 = 20,700.56 : x
2. Step 2: Convert to fraction form
   13,672.55/20,700.56 = 20,700.56/x
3. Step 3: Cross multiply
   13,672.55x = 20,700.56 × 20,700.56
4. Step 4: Simplify right side
   13,672.55x = 428,513,287.82
5. Step 5: Solve for x
   x = 428,513,287.82/13,672.55
6. Step 6: Final answer
   x = 31,341.15