Finding the Third Proportional to 131,247,864 and 287,238,864

Step by Step Solution

1. Step 1: Write the proportion equation
   131,247,864 : 287,238,864 = 287,238,864 : x
2. Step 2: Convert to fraction form
   131,247,864/287,238,864 = 287,238,864/x
3. Step 3: Cross multiply
   131,247,864x = 287,238,864 × 287,238,864
4. Step 4: Simplify right side
   131,247,864x = 82,506,164,992,010,496
5. Step 5: Solve for x
   x = 82,506,164,992,010,496/131,247,864
6. Step 6: Final answer
   x = 628,628,630.42