Finding the Third Proportional to 12,807,128 and 19,673,314

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807,128 : 19,673,314 = 19,673,314 : x
2. Step 2: Convert to fraction form
   12,807,128/19,673,314 = 19,673,314/x
3. Step 3: Cross multiply
   12,807,128x = 19,673,314 × 19,673,314
4. Step 4: Simplify right side
   12,807,128x = 387,039,283,742,596
5. Step 5: Solve for x
   x = 387,039,283,742,596/12,807,128
6. Step 6: Final answer
   x = 30,220,614.94