Finding the Third Proportional to 39,456,388 and 86,455,496

Step by Step Solution

1. Step 1: Write the proportion equation
   39,456,388 : 86,455,496 = 86,455,496 : x
2. Step 2: Convert to fraction form
   39,456,388/86,455,496 = 86,455,496/x
3. Step 3: Cross multiply
   39,456,388x = 86,455,496 × 86,455,496
4. Step 4: Simplify right side
   39,456,388x = 7,474,552,788,606,016
5. Step 5: Solve for x
   x = 7,474,552,788,606,016/39,456,388
6. Step 6: Final answer
   x = 189,438,343.64