Finding the Third Proportional to 111,887 and 243,253

Step by Step Solution

1. Step 1: Write the proportion equation
   111,887 : 243,253 = 243,253 : x
2. Step 2: Convert to fraction form
   111,887/243,253 = 243,253/x
3. Step 3: Cross multiply
   111,887x = 243,253 × 243,253
4. Step 4: Simplify right side
   111,887x = 59,172,022,009
5. Step 5: Solve for x
   x = 59,172,022,009/111,887
6. Step 6: Final answer
   x = 528,855.20