Finding the Third Proportional to 359,372 and 557,222

Step by Step Solution

1. Step 1: Write the proportion equation
   359,372 : 557,222 = 557,222 : x
2. Step 2: Convert to fraction form
   359,372/557,222 = 557,222/x
3. Step 3: Cross multiply
   359,372x = 557,222 × 557,222
4. Step 4: Simplify right side
   359,372x = 310,496,357,284
5. Step 5: Solve for x
   x = 310,496,357,284/359,372
6. Step 6: Final answer
   x = 863,997.08