Finding the Third Proportional to 221,888 and 485,248

Step by Step Solution

1. Step 1: Write the proportion equation
   221,888 : 485,248 = 485,248 : x
2. Step 2: Convert to fraction form
   221,888/485,248 = 485,248/x
3. Step 3: Cross multiply
   221,888x = 485,248 × 485,248
4. Step 4: Simplify right side
   221,888x = 235,465,621,504
5. Step 5: Solve for x
   x = 235,465,621,504/221,888
6. Step 6: Final answer
   x = 1,061,191.33