Finding the Third Proportional to 39,456,345 and 86,455,410

Step by Step Solution

1. Step 1: Write the proportion equation
   39,456,345 : 86,455,410 = 86,455,410 : x
2. Step 2: Convert to fraction form
   39,456,345/86,455,410 = 86,455,410/x
3. Step 3: Cross multiply
   39,456,345x = 86,455,410 × 86,455,410
4. Step 4: Simplify right side
   39,456,345x = 7,474,537,918,268,100
5. Step 5: Solve for x
   x = 7,474,537,918,268,100/39,456,345
6. Step 6: Final answer
   x = 189,438,173.21