Finding the Third Proportional to 539,665 and 1,187,991

Step by Step Solution

1. Step 1: Write the proportion equation
   539,665 : 1,187,991 = 1,187,991 : x
2. Step 2: Convert to fraction form
   539,665/1,187,991 = 1,187,991/x
3. Step 3: Cross multiply
   539,665x = 1,187,991 × 1,187,991
4. Step 4: Simplify right side
   539,665x = 1,411,322,616,081
5. Step 5: Solve for x
   x = 1,411,322,616,081/539,665
6. Step 6: Final answer
   x = 2,615,182.78