Finding the Third Proportional to 638,070 and 1,401,928

Step by Step Solution

1. Step 1: Write the proportion equation
   638,070 : 1,401,928 = 1,401,928 : x
2. Step 2: Convert to fraction form
   638,070/1,401,928 = 1,401,928/x
3. Step 3: Cross multiply
   638,070x = 1,401,928 × 1,401,928
4. Step 4: Simplify right side
   638,070x = 1,965,402,117,184
5. Step 5: Solve for x
   x = 1,965,402,117,184/638,070
6. Step 6: Final answer
   x = 3,080,229.63