Finding the Third Proportional to 8,378,964 and 12,812,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,378,964 : 12,812,106.50 = 12,812,106.50 : x
2. Step 2: Convert to fraction form
   8,378,964/12,812,106.50 = 12,812,106.50/x
3. Step 3: Cross multiply
   8,378,964x = 12,812,106.50 × 12,812,106.50
4. Step 4: Simplify right side
   8,378,964x = 164,150,072,967,342.25
5. Step 5: Solve for x
   x = 164,150,072,967,342.25/8,378,964
6. Step 6: Final answer
   x = 19,590,736.15