Finding the Third Proportional to 8,499,481 and 12,820,380

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499,481 : 12,820,380 = 12,820,380 : x
2. Step 2: Convert to fraction form
   8,499,481/12,820,380 = 12,820,380/x
3. Step 3: Cross multiply
   8,499,481x = 12,820,380 × 12,820,380
4. Step 4: Simplify right side
   8,499,481x = 164,362,143,344,400
5. Step 5: Solve for x
   x = 164,362,143,344,400/8,499,481
6. Step 6: Final answer
   x = 19,337,903.50