Finding the Third Proportional to 39,921,270 and 86,618,434

Step by Step Solution

1. Step 1: Write the proportion equation
   39,921,270 : 86,618,434 = 86,618,434 : x
2. Step 2: Convert to fraction form
   39,921,270/86,618,434 = 86,618,434/x
3. Step 3: Cross multiply
   39,921,270x = 86,618,434 × 86,618,434
4. Step 4: Simplify right side
   39,921,270x = 7,502,753,108,612,356
5. Step 5: Solve for x
   x = 7,502,753,108,612,356/39,921,270
6. Step 6: Final answer
   x = 187,938,738.14