Finding the Third Proportional to 38,439.56 and 51,721.03

Step by Step Solution

1. Step 1: Write the proportion equation
   38,439.56 : 51,721.03 = 51,721.03 : x
2. Step 2: Convert to fraction form
   38,439.56/51,721.03 = 51,721.03/x
3. Step 3: Cross multiply
   38,439.56x = 51,721.03 × 51,721.03
4. Step 4: Simplify right side
   38,439.56x = 2,675,065,073.56
5. Step 5: Solve for x
   x = 2,675,065,073.56/38,439.56
6. Step 6: Final answer
   x = 69,591.45