Finding the Third Proportional to 112,212 and 243,499

Step by Step Solution

1. Step 1: Write the proportion equation
   112,212 : 243,499 = 243,499 : x
2. Step 2: Convert to fraction form
   112,212/243,499 = 243,499/x
3. Step 3: Cross multiply
   112,212x = 243,499 × 243,499
4. Step 4: Simplify right side
   112,212x = 59,291,763,001
5. Step 5: Solve for x
   x = 59,291,763,001/112,212
6. Step 6: Final answer
   x = 528,390.57