Finding the Third Proportional to 39,691.50 and 56,418.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,691.50 : 56,418.75 = 56,418.75 : x
2. Step 2: Convert to fraction form
   39,691.50/56,418.75 = 56,418.75/x
3. Step 3: Cross multiply
   39,691.50x = 56,418.75 × 56,418.75
4. Step 4: Simplify right side
   39,691.50x = 3,183,075,351.56
5. Step 5: Solve for x
   x = 3,183,075,351.56/39,691.50
6. Step 6: Final answer
   x = 80,195.39