Finding the Third Proportional to 644,160 and 874,752

Step by Step Solution

1. Step 1: Write the proportion equation
   644,160 : 874,752 = 874,752 : x
2. Step 2: Convert to fraction form
   644,160/874,752 = 874,752/x
3. Step 3: Cross multiply
   644,160x = 874,752 × 874,752
4. Step 4: Simplify right side
   644,160x = 765,191,061,504
5. Step 5: Solve for x
   x = 765,191,061,504/644,160
6. Step 6: Final answer
   x = 1,187,889.75