Finding the Third Proportional to 9,129.38 and 19,645.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129.38 : 19,645.88 = 19,645.88 : x
2. Step 2: Convert to fraction form
   9,129.38/19,645.88 = 19,645.88/x
3. Step 3: Cross multiply
   9,129.38x = 19,645.88 × 19,645.88
4. Step 4: Simplify right side
   9,129.38x = 385,960,404.52
5. Step 5: Solve for x
   x = 385,960,404.52/9,129.38
6. Step 6: Final answer
   x = 42,276.76