Finding the Third Proportional to 644,752,912.50 and 1,381,456,498.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,752,912.50 : 1,381,456,498.50 = 1,381,456,498.50 : x
2. Step 2: Convert to fraction form
   644,752,912.50/1,381,456,498.50 = 1,381,456,498.50/x
3. Step 3: Cross multiply
   644,752,912.50x = 1,381,456,498.50 × 1,381,456,498.50
4. Step 4: Simplify right side
   644,752,912.50x = 1,908,422,057,247,880,448
5. Step 5: Solve for x
   x = 1,908,422,057,247,880,448/644,752,912.50
6. Step 6: Final answer
   x = 2,959,927,780.47