Finding the Third Proportional to 13,607.63 and 20,616.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,607.63 : 20,616.56 = 20,616.56 : x
2. Step 2: Convert to fraction form
   13,607.63/20,616.56 = 20,616.56/x
3. Step 3: Cross multiply
   13,607.63x = 20,616.56 × 20,616.56
4. Step 4: Simplify right side
   13,607.63x = 425,042,649.32
5. Step 5: Solve for x
   x = 425,042,649.32/13,607.63
6. Step 6: Final answer
   x = 31,235.62