Finding the Third Proportional to 9,178.31 and 13,729.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.31 : 13,729.50 = 13,729.50 : x
2. Step 2: Convert to fraction form
   9,178.31/13,729.50 = 13,729.50/x
3. Step 3: Cross multiply
   9,178.31x = 13,729.50 × 13,729.50
4. Step 4: Simplify right side
   9,178.31x = 188,499,170.25
5. Step 5: Solve for x
   x = 188,499,170.25/9,178.31
6. Step 6: Final answer
   x = 20,537.45