Finding the Third Proportional to 643,762 and 1,385,696

Step by Step Solution

1. Step 1: Write the proportion equation
   643,762 : 1,385,696 = 1,385,696 : x
2. Step 2: Convert to fraction form
   643,762/1,385,696 = 1,385,696/x
3. Step 3: Cross multiply
   643,762x = 1,385,696 × 1,385,696
4. Step 4: Simplify right side
   643,762x = 1,920,153,404,416
5. Step 5: Solve for x
   x = 1,920,153,404,416/643,762
6. Step 6: Final answer
   x = 2,982,706.97