Finding the Third Proportional to 222,248 and 488,990

Step by Step Solution

1. Step 1: Write the proportion equation
   222,248 : 488,990 = 488,990 : x
2. Step 2: Convert to fraction form
   222,248/488,990 = 488,990/x
3. Step 3: Cross multiply
   222,248x = 488,990 × 488,990
4. Step 4: Simplify right side
   222,248x = 239,111,220,100
5. Step 5: Solve for x
   x = 239,111,220,100/222,248
6. Step 6: Final answer
   x = 1,075,875.69