Finding the Third Proportional to 76,931.25 and 173,616.75

Step by Step Solution

1. Step 1: Write the proportion equation
   76,931.25 : 173,616.75 = 173,616.75 : x
2. Step 2: Convert to fraction form
   76,931.25/173,616.75 = 173,616.75/x
3. Step 3: Cross multiply
   76,931.25x = 173,616.75 × 173,616.75
4. Step 4: Simplify right side
   76,931.25x = 30,142,775,880.56
5. Step 5: Solve for x
   x = 30,142,775,880.56/76,931.25
6. Step 6: Final answer
   x = 391,814.46