Finding the Third Proportional to 31,238.72 and 68,556.66

Step by Step Solution

1. Step 1: Write the proportion equation
   31,238.72 : 68,556.66 = 68,556.66 : x
2. Step 2: Convert to fraction form
   31,238.72/68,556.66 = 68,556.66/x
3. Step 3: Cross multiply
   31,238.72x = 68,556.66 × 68,556.66
4. Step 4: Simplify right side
   31,238.72x = 4,700,015,116.18
5. Step 5: Solve for x
   x = 4,700,015,116.18/31,238.72
6. Step 6: Final answer
   x = 150,454.80