Finding the Third Proportional to 171,345,840 and 261,036,264

Step by Step Solution

1. Step 1: Write the proportion equation
   171,345,840 : 261,036,264 = 261,036,264 : x
2. Step 2: Convert to fraction form
   171,345,840/261,036,264 = 261,036,264/x
3. Step 3: Cross multiply
   171,345,840x = 261,036,264 × 261,036,264
4. Step 4: Simplify right side
   171,345,840x = 68,139,931,123,077,696
5. Step 5: Solve for x
   x = 68,139,931,123,077,696/171,345,840
6. Step 6: Final answer
   x = 397,674,849.43