Finding the Third Proportional to 8,690,143.50 and 13,147,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,143.50 : 13,147,064.50 = 13,147,064.50 : x
2. Step 2: Convert to fraction form
   8,690,143.50/13,147,064.50 = 13,147,064.50/x
3. Step 3: Cross multiply
   8,690,143.50x = 13,147,064.50 × 13,147,064.50
4. Step 4: Simplify right side
   8,690,143.50x = 172,845,304,967,160.25
5. Step 5: Solve for x
   x = 172,845,304,967,160.25/8,690,143.50
6. Step 6: Final answer
   x = 19,889,810.22