Finding the Third Proportional to 807,640 and 1,245,160

Step by Step Solution

1. Step 1: Write the proportion equation
   807,640 : 1,245,160 = 1,245,160 : x
2. Step 2: Convert to fraction form
   807,640/1,245,160 = 1,245,160/x
3. Step 3: Cross multiply
   807,640x = 1,245,160 × 1,245,160
4. Step 4: Simplify right side
   807,640x = 1,550,423,425,600
5. Step 5: Solve for x
   x = 1,550,423,425,600/807,640
6. Step 6: Final answer
   x = 1,919,696.18