Finding the Third Proportional to 221,808 and 487,908

Step by Step Solution

1. Step 1: Write the proportion equation
   221,808 : 487,908 = 487,908 : x
2. Step 2: Convert to fraction form
   221,808/487,908 = 487,908/x
3. Step 3: Cross multiply
   221,808x = 487,908 × 487,908
4. Step 4: Simplify right side
   221,808x = 238,054,216,464
5. Step 5: Solve for x
   x = 238,054,216,464/221,808
6. Step 6: Final answer
   x = 1,073,244.50