Finding the Third Proportional to 9,340.31 and 20,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,340.31 : 20,434.78 = 20,434.78 : x
2. Step 2: Convert to fraction form
   9,340.31/20,434.78 = 20,434.78/x
3. Step 3: Cross multiply
   9,340.31x = 20,434.78 × 20,434.78
4. Step 4: Simplify right side
   9,340.31x = 417,580,284.74
5. Step 5: Solve for x
   x = 417,580,284.74/9,340.31
6. Step 6: Final answer
   x = 44,707.31