Finding the Third Proportional to 20,399.63 and 31,186.13

Step by Step Solution

1. Step 1: Write the proportion equation
   20,399.63 : 31,186.13 = 31,186.13 : x
2. Step 2: Convert to fraction form
   20,399.63/31,186.13 = 31,186.13/x
3. Step 3: Cross multiply
   20,399.63x = 31,186.13 × 31,186.13
4. Step 4: Simplify right side
   20,399.63x = 972,574,392.52
5. Step 5: Solve for x
   x = 972,574,392.52/20,399.63
6. Step 6: Final answer
   x = 47,676.09