Finding the Third Proportional to 12,808,107 and 19,810,678.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808,107 : 19,810,678.50 = 19,810,678.50 : x
2. Step 2: Convert to fraction form
   12,808,107/19,810,678.50 = 19,810,678.50/x
3. Step 3: Cross multiply
   12,808,107x = 19,810,678.50 × 19,810,678.50
4. Step 4: Simplify right side
   12,808,107x = 392,462,982,630,362.25
5. Step 5: Solve for x
   x = 392,462,982,630,362.25/12,808,107
6. Step 6: Final answer
   x = 30,641,763.27