Finding the Third Proportional to 9,225.56 and 19,909.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,225.56 : 19,909.69 = 19,909.69 : x
2. Step 2: Convert to fraction form
   9,225.56/19,909.69 = 19,909.69/x
3. Step 3: Cross multiply
   9,225.56x = 19,909.69 × 19,909.69
4. Step 4: Simplify right side
   9,225.56x = 396,395,656.35
5. Step 5: Solve for x
   x = 396,395,656.35/9,225.56
6. Step 6: Final answer
   x = 42,967.10