Finding the Third Proportional to 9,123.89 and 19,671.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.89 : 19,671.61 = 19,671.61 : x
2. Step 2: Convert to fraction form
   9,123.89/19,671.61 = 19,671.61/x
3. Step 3: Cross multiply
   9,123.89x = 19,671.61 × 19,671.61
4. Step 4: Simplify right side
   9,123.89x = 386,972,215.40
5. Step 5: Solve for x
   x = 386,972,215.40/9,123.89
6. Step 6: Final answer
   x = 42,413.07