Finding the Third Proportional to 361,111 and 780,040

Step by Step Solution

1. Step 1: Write the proportion equation
   361,111 : 780,040 = 780,040 : x
2. Step 2: Convert to fraction form
   361,111/780,040 = 780,040/x
3. Step 3: Cross multiply
   361,111x = 780,040 × 780,040
4. Step 4: Simplify right side
   361,111x = 608,462,401,600
5. Step 5: Solve for x
   x = 608,462,401,600/361,111
6. Step 6: Final answer
   x = 1,684,973.32