Finding the Third Proportional to 552,492 and 1,221,138

Step by Step Solution

1. Step 1: Write the proportion equation
   552,492 : 1,221,138 = 1,221,138 : x
2. Step 2: Convert to fraction form
   552,492/1,221,138 = 1,221,138/x
3. Step 3: Cross multiply
   552,492x = 1,221,138 × 1,221,138
4. Step 4: Simplify right side
   552,492x = 1,491,178,015,044
5. Step 5: Solve for x
   x = 1,491,178,015,044/552,492
6. Step 6: Final answer
   x = 2,699,003.81