Finding the Third Proportional to 31,200.75 and 64,950.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,200.75 : 64,950.75 = 64,950.75 : x
2. Step 2: Convert to fraction form
   31,200.75/64,950.75 = 64,950.75/x
3. Step 3: Cross multiply
   31,200.75x = 64,950.75 × 64,950.75
4. Step 4: Simplify right side
   31,200.75x = 4,218,599,925.56
5. Step 5: Solve for x
   x = 4,218,599,925.56/31,200.75
6. Step 6: Final answer
   x = 135,208.29