Finding the Third Proportional to 118,710 and 280,242

Step by Step Solution

1. Step 1: Write the proportion equation
   118,710 : 280,242 = 280,242 : x
2. Step 2: Convert to fraction form
   118,710/280,242 = 280,242/x
3. Step 3: Cross multiply
   118,710x = 280,242 × 280,242
4. Step 4: Simplify right side
   118,710x = 78,535,578,564
5. Step 5: Solve for x
   x = 78,535,578,564/118,710
6. Step 6: Final answer
   x = 661,575.09