Finding the Third Proportional to 31,212.56 and 68,787.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,212.56 : 68,787.75 = 68,787.75 : x
2. Step 2: Convert to fraction form
   31,212.56/68,787.75 = 68,787.75/x
3. Step 3: Cross multiply
   31,212.56x = 68,787.75 × 68,787.75
4. Step 4: Simplify right side
   31,212.56x = 4,731,754,550.06
5. Step 5: Solve for x
   x = 4,731,754,550.06/31,212.56
6. Step 6: Final answer
   x = 151,597.76