Finding the Third Proportional to 556,222 and 1,216,988

Step by Step Solution

1. Step 1: Write the proportion equation
   556,222 : 1,216,988 = 1,216,988 : x
2. Step 2: Convert to fraction form
   556,222/1,216,988 = 1,216,988/x
3. Step 3: Cross multiply
   556,222x = 1,216,988 × 1,216,988
4. Step 4: Simplify right side
   556,222x = 1,481,059,792,144
5. Step 5: Solve for x
   x = 1,481,059,792,144/556,222
6. Step 6: Final answer
   x = 2,662,713.43