Finding the Third Proportional to 9,142.31 and 13,653.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.31 : 13,653.56 = 13,653.56 : x
2. Step 2: Convert to fraction form
   9,142.31/13,653.56 = 13,653.56/x
3. Step 3: Cross multiply
   9,142.31x = 13,653.56 × 13,653.56
4. Step 4: Simplify right side
   9,142.31x = 186,419,768.94
5. Step 5: Solve for x
   x = 186,419,768.94/9,142.31
6. Step 6: Final answer
   x = 20,390.88