Finding the Third Proportional to 12,639,990 and 19,092,822

Step by Step Solution

1. Step 1: Write the proportion equation
   12,639,990 : 19,092,822 = 19,092,822 : x
2. Step 2: Convert to fraction form
   12,639,990/19,092,822 = 19,092,822/x
3. Step 3: Cross multiply
   12,639,990x = 19,092,822 × 19,092,822
4. Step 4: Simplify right side
   12,639,990x = 364,535,851,923,684
5. Step 5: Solve for x
   x = 364,535,851,923,684/12,639,990
6. Step 6: Final answer
   x = 28,839,884.52