Finding the Third Proportional to 13,621.50 and 34,728.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,621.50 : 34,728.75 = 34,728.75 : x
2. Step 2: Convert to fraction form
   13,621.50/34,728.75 = 34,728.75/x
3. Step 3: Cross multiply
   13,621.50x = 34,728.75 × 34,728.75
4. Step 4: Simplify right side
   13,621.50x = 1,206,086,076.56
5. Step 5: Solve for x
   x = 1,206,086,076.56/13,621.50
6. Step 6: Final answer
   x = 88,542.82