Finding the Third Proportional to 171,345,808 and 261,036,216

Step by Step Solution

1. Step 1: Write the proportion equation
   171,345,808 : 261,036,216 = 261,036,216 : x
2. Step 2: Convert to fraction form
   171,345,808/261,036,216 = 261,036,216/x
3. Step 3: Cross multiply
   171,345,808x = 261,036,216 × 261,036,216
4. Step 4: Simplify right side
   171,345,808x = 68,139,906,063,598,656
5. Step 5: Solve for x
   x = 68,139,906,063,598,656/171,345,808
6. Step 6: Final answer
   x = 397,674,777.45