Finding the Third Proportional to 28,137.75 and 42,921.38

Step by Step Solution

1. Step 1: Write the proportion equation
   28,137.75 : 42,921.38 = 42,921.38 : x
2. Step 2: Convert to fraction form
   28,137.75/42,921.38 = 42,921.38/x
3. Step 3: Cross multiply
   28,137.75x = 42,921.38 × 42,921.38
4. Step 4: Simplify right side
   28,137.75x = 1,842,244,431.89
5. Step 5: Solve for x
   x = 1,842,244,431.89/28,137.75
6. Step 6: Final answer
   x = 65,472.34