Finding the Third Proportional to 318,029,166 and 672,726,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,029,166 : 672,726,667.50 = 672,726,667.50 : x
2. Step 2: Convert to fraction form
   318,029,166/672,726,667.50 = 672,726,667.50/x
3. Step 3: Cross multiply
   318,029,166x = 672,726,667.50 × 672,726,667.50
4. Step 4: Simplify right side
   318,029,166x = 452,561,169,165,655,552
5. Step 5: Solve for x
   x = 452,561,169,165,655,552/318,029,166
6. Step 6: Final answer
   x = 1,423,017,815.81