Finding the Third Proportional to 9,155,316 and 12,800,494

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155,316 : 12,800,494 = 12,800,494 : x
2. Step 2: Convert to fraction form
   9,155,316/12,800,494 = 12,800,494/x
3. Step 3: Cross multiply
   9,155,316x = 12,800,494 × 12,800,494
4. Step 4: Simplify right side
   9,155,316x = 163,852,646,644,036
5. Step 5: Solve for x
   x = 163,852,646,644,036/9,155,316
6. Step 6: Final answer
   x = 17,896,995.22