Finding the Third Proportional to 78,912,714 and 172,910,868

Step by Step Solution

1. Step 1: Write the proportion equation
   78,912,714 : 172,910,868 = 172,910,868 : x
2. Step 2: Convert to fraction form
   78,912,714/172,910,868 = 172,910,868/x
3. Step 3: Cross multiply
   78,912,714x = 172,910,868 × 172,910,868
4. Step 4: Simplify right side
   78,912,714x = 29,898,168,272,513,424
5. Step 5: Solve for x
   x = 29,898,168,272,513,424/78,912,714
6. Step 6: Final answer
   x = 378,876,441.54