Finding the Third Proportional to 42,447.75 and 57,443.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,447.75 : 57,443.25 = 57,443.25 : x
2. Step 2: Convert to fraction form
   42,447.75/57,443.25 = 57,443.25/x
3. Step 3: Cross multiply
   42,447.75x = 57,443.25 × 57,443.25
4. Step 4: Simplify right side
   42,447.75x = 3,299,726,970.56
5. Step 5: Solve for x
   x = 3,299,726,970.56/42,447.75
6. Step 6: Final answer
   x = 77,736.20