Finding the Third Proportional to 9,129.38 and 13,054.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.38 : 13,054.50 = 13,054.50 : x
2. Step 2: Convert to fraction form
   9,129.38/13,054.50 = 13,054.50/x
3. Step 3: Cross multiply
   9,129.38x = 13,054.50 × 13,054.50
4. Step 4: Simplify right side
   9,129.38x = 170,419,970.25
5. Step 5: Solve for x
   x = 170,419,970.25/9,129.38
6. Step 6: Final answer
   x = 18,667.21