Finding the Third Proportional to 72,328.75 and 111,242

Step by Step Solution

1. Step 1: Write the proportion equation
   72,328.75 : 111,242 = 111,242 : x
2. Step 2: Convert to fraction form
   72,328.75/111,242 = 111,242/x
3. Step 3: Cross multiply
   72,328.75x = 111,242 × 111,242
4. Step 4: Simplify right side
   72,328.75x = 12,374,782,564
5. Step 5: Solve for x
   x = 12,374,782,564/72,328.75
6. Step 6: Final answer
   x = 171,090.78