Finding the Third Proportional to 638,090 and 1,401,968

Step by Step Solution

1. Step 1: Write the proportion equation
   638,090 : 1,401,968 = 1,401,968 : x
2. Step 2: Convert to fraction form
   638,090/1,401,968 = 1,401,968/x
3. Step 3: Cross multiply
   638,090x = 1,401,968 × 1,401,968
4. Step 4: Simplify right side
   638,090x = 1,965,514,273,024
5. Step 5: Solve for x
   x = 1,965,514,273,024/638,090
6. Step 6: Final answer
   x = 3,080,308.85