Finding the Third Proportional to 222,156 and 487,530

Step by Step Solution

1. Step 1: Write the proportion equation
   222,156 : 487,530 = 487,530 : x
2. Step 2: Convert to fraction form
   222,156/487,530 = 487,530/x
3. Step 3: Cross multiply
   222,156x = 487,530 × 487,530
4. Step 4: Simplify right side
   222,156x = 237,685,500,900
5. Step 5: Solve for x
   x = 237,685,500,900/222,156
6. Step 6: Final answer
   x = 1,069,903.59