Finding the Third Proportional to 221,988 and 488,168

Step by Step Solution

1. Step 1: Write the proportion equation
   221,988 : 488,168 = 488,168 : x
2. Step 2: Convert to fraction form
   221,988/488,168 = 488,168/x
3. Step 3: Cross multiply
   221,988x = 488,168 × 488,168
4. Step 4: Simplify right side
   221,988x = 238,307,996,224
5. Step 5: Solve for x
   x = 238,307,996,224/221,988
6. Step 6: Final answer
   x = 1,073,517.47