Finding the Third Proportional to 39,921,363 and 86,618,610

Step by Step Solution

1. Step 1: Write the proportion equation
   39,921,363 : 86,618,610 = 86,618,610 : x
2. Step 2: Convert to fraction form
   39,921,363/86,618,610 = 86,618,610/x
3. Step 3: Cross multiply
   39,921,363x = 86,618,610 × 86,618,610
4. Step 4: Simplify right side
   39,921,363x = 7,502,783,598,332,100
5. Step 5: Solve for x
   x = 7,502,783,598,332,100/39,921,363
6. Step 6: Final answer
   x = 187,939,064.06