Finding the Third Proportional to 644,614,236 and 1,381,123,164

Step by Step Solution

1. Step 1: Write the proportion equation
   644,614,236 : 1,381,123,164 = 1,381,123,164 : x
2. Step 2: Convert to fraction form
   644,614,236/1,381,123,164 = 1,381,123,164/x
3. Step 3: Cross multiply
   644,614,236x = 1,381,123,164 × 1,381,123,164
4. Step 4: Simplify right side
   644,614,236x = 1,907,501,194,137,370,880
5. Step 5: Solve for x
   x = 1,907,501,194,137,370,880/644,614,236
6. Step 6: Final answer
   x = 2,959,136,003.53