Finding the Third Proportional to 78,309,516 and 171,677,908

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309,516 : 171,677,908 = 171,677,908 : x
2. Step 2: Convert to fraction form
   78,309,516/171,677,908 = 171,677,908/x
3. Step 3: Cross multiply
   78,309,516x = 171,677,908 × 171,677,908
4. Step 4: Simplify right side
   78,309,516x = 29,473,304,095,256,464
5. Step 5: Solve for x
   x = 29,473,304,095,256,464/78,309,516
6. Step 6: Final answer
   x = 376,369,381.41