Finding the Third Proportional to 172,287,086 and 378,049,488

Step by Step Solution

1. Step 1: Write the proportion equation
   172,287,086 : 378,049,488 = 378,049,488 : x
2. Step 2: Convert to fraction form
   172,287,086/378,049,488 = 378,049,488/x
3. Step 3: Cross multiply
   172,287,086x = 378,049,488 × 378,049,488
4. Step 4: Simplify right side
   172,287,086x = 142,921,415,377,062,144
5. Step 5: Solve for x
   x = 142,921,415,377,062,144/172,287,086
6. Step 6: Final answer
   x = 829,553,849.31