Finding the Third Proportional to 31,284.56 and 68,521.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,284.56 : 68,521.78 = 68,521.78 : x
2. Step 2: Convert to fraction form
   31,284.56/68,521.78 = 68,521.78/x
3. Step 3: Cross multiply
   31,284.56x = 68,521.78 × 68,521.78
4. Step 4: Simplify right side
   31,284.56x = 4,695,234,505.67
5. Step 5: Solve for x
   x = 4,695,234,505.67/31,284.56
6. Step 6: Final answer
   x = 150,081.51