Finding the Third Proportional to 258,228 and 556,002

Step by Step Solution

1. Step 1: Write the proportion equation
   258,228 : 556,002 = 556,002 : x
2. Step 2: Convert to fraction form
   258,228/556,002 = 556,002/x
3. Step 3: Cross multiply
   258,228x = 556,002 × 556,002
4. Step 4: Simplify right side
   258,228x = 309,138,224,004
5. Step 5: Solve for x
   x = 309,138,224,004/258,228
6. Step 6: Final answer
   x = 1,197,152.22