Finding the Third Proportional to 42,380.72 and 57,558.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380.72 : 57,558.73 = 57,558.73 : x
2. Step 2: Convert to fraction form
   42,380.72/57,558.73 = 57,558.73/x
3. Step 3: Cross multiply
   42,380.72x = 57,558.73 × 57,558.73
4. Step 4: Simplify right side
   42,380.72x = 3,313,007,003.50
5. Step 5: Solve for x
   x = 3,313,007,003.50/42,380.72
6. Step 6: Final answer
   x = 78,172.51