Finding the Third Proportional to 221,616 and 488,808

Step by Step Solution

1. Step 1: Write the proportion equation
   221,616 : 488,808 = 488,808 : x
2. Step 2: Convert to fraction form
   221,616/488,808 = 488,808/x
3. Step 3: Cross multiply
   221,616x = 488,808 × 488,808
4. Step 4: Simplify right side
   221,616x = 238,933,260,864
5. Step 5: Solve for x
   x = 238,933,260,864/221,616
6. Step 6: Final answer
   x = 1,078,140.84