Finding the Third Proportional to 8,461,513 and 12,890,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,461,513 : 12,890,665.50 = 12,890,665.50 : x
2. Step 2: Convert to fraction form
   8,461,513/12,890,665.50 = 12,890,665.50/x
3. Step 3: Cross multiply
   8,461,513x = 12,890,665.50 × 12,890,665.50
4. Step 4: Simplify right side
   8,461,513x = 166,169,257,032,890.25
5. Step 5: Solve for x
   x = 166,169,257,032,890.25/8,461,513
6. Step 6: Final answer
   x = 19,638,244.02