Finding the Third Proportional to 42,665.50 and 57,436

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.50 : 57,436 = 57,436 : x
2. Step 2: Convert to fraction form
   42,665.50/57,436 = 57,436/x
3. Step 3: Cross multiply
   42,665.50x = 57,436 × 57,436
4. Step 4: Simplify right side
   42,665.50x = 3,298,894,096
5. Step 5: Solve for x
   x = 3,298,894,096/42,665.50
6. Step 6: Final answer
   x = 77,319.94