Finding the Third Proportional to 31,218.75 and 48,920.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,218.75 : 48,920.63 = 48,920.63 : x
2. Step 2: Convert to fraction form
   31,218.75/48,920.63 = 48,920.63/x
3. Step 3: Cross multiply
   31,218.75x = 48,920.63 × 48,920.63
4. Step 4: Simplify right side
   31,218.75x = 2,393,227,550.39
5. Step 5: Solve for x
   x = 2,393,227,550.39/31,218.75
6. Step 6: Final answer
   x = 76,659.94