Finding the Third Proportional to 8,499,479 and 12,820,377

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499,479 : 12,820,377 = 12,820,377 : x
2. Step 2: Convert to fraction form
   8,499,479/12,820,377 = 12,820,377/x
3. Step 3: Cross multiply
   8,499,479x = 12,820,377 × 12,820,377
4. Step 4: Simplify right side
   8,499,479x = 164,362,066,422,129
5. Step 5: Solve for x
   x = 164,362,066,422,129/8,499,479
6. Step 6: Final answer
   x = 19,337,899.00