Finding the Third Proportional to 28,912.50 and 42,270.75

Step by Step Solution

1. Step 1: Write the proportion equation
   28,912.50 : 42,270.75 = 42,270.75 : x
2. Step 2: Convert to fraction form
   28,912.50/42,270.75 = 42,270.75/x
3. Step 3: Cross multiply
   28,912.50x = 42,270.75 × 42,270.75
4. Step 4: Simplify right side
   28,912.50x = 1,786,816,305.56
5. Step 5: Solve for x
   x = 1,786,816,305.56/28,912.50
6. Step 6: Final answer
   x = 61,800.82