Finding the Third Proportional to 8,391,563.50 and 12,958,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,391,563.50 : 12,958,042.50 = 12,958,042.50 : x
2. Step 2: Convert to fraction form
   8,391,563.50/12,958,042.50 = 12,958,042.50/x
3. Step 3: Cross multiply
   8,391,563.50x = 12,958,042.50 × 12,958,042.50
4. Step 4: Simplify right side
   8,391,563.50x = 167,910,865,431,806.25
5. Step 5: Solve for x
   x = 167,910,865,431,806.25/8,391,563.50
6. Step 6: Final answer
   x = 20,009,485.17