Finding the Third Proportional to 9,420.47 and 12,793.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,420.47 : 12,793.78 = 12,793.78 : x
2. Step 2: Convert to fraction form
   9,420.47/12,793.78 = 12,793.78/x
3. Step 3: Cross multiply
   9,420.47x = 12,793.78 × 12,793.78
4. Step 4: Simplify right side
   9,420.47x = 163,680,838.67
5. Step 5: Solve for x
   x = 163,680,838.67/9,420.47
6. Step 6: Final answer
   x = 17,375.02