Finding the Third Proportional to 1,687,438 and 3,640,064

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687,438 : 3,640,064 = 3,640,064 : x
2. Step 2: Convert to fraction form
   1,687,438/3,640,064 = 3,640,064/x
3. Step 3: Cross multiply
   1,687,438x = 3,640,064 × 3,640,064
4. Step 4: Simplify right side
   1,687,438x = 13,250,065,924,096
5. Step 5: Solve for x
   x = 13,250,065,924,096/1,687,438
6. Step 6: Final answer
   x = 7,852,179.41