Finding the Third Proportional to 9,421.31 and 20,300.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,421.31 : 20,300.63 = 20,300.63 : x
2. Step 2: Convert to fraction form
   9,421.31/20,300.63 = 20,300.63/x
3. Step 3: Cross multiply
   9,421.31x = 20,300.63 × 20,300.63
4. Step 4: Simplify right side
   9,421.31x = 412,115,375.39
5. Step 5: Solve for x
   x = 412,115,375.39/9,421.31
6. Step 6: Final answer
   x = 43,742.88