Finding the Third Proportional to 42,445.50 and 57,440.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,445.50 : 57,440.25 = 57,440.25 : x
2. Step 2: Convert to fraction form
   42,445.50/57,440.25 = 57,440.25/x
3. Step 3: Cross multiply
   42,445.50x = 57,440.25 × 57,440.25
4. Step 4: Simplify right side
   42,445.50x = 3,299,382,320.06
5. Step 5: Solve for x
   x = 3,299,382,320.06/42,445.50
6. Step 6: Final answer
   x = 77,732.21