Finding the Third Proportional to 644,161 and 947,297.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,161 : 947,297.50 = 947,297.50 : x
2. Step 2: Convert to fraction form
   644,161/947,297.50 = 947,297.50/x
3. Step 3: Cross multiply
   644,161x = 947,297.50 × 947,297.50
4. Step 4: Simplify right side
   644,161x = 897,372,553,506.25
5. Step 5: Solve for x
   x = 897,372,553,506.25/644,161
6. Step 6: Final answer
   x = 1,393,087.37