Finding the Third Proportional to 20,391.19 and 31,196.81

Step by Step Solution

1. Step 1: Write the proportion equation
   20,391.19 : 31,196.81 = 31,196.81 : x
2. Step 2: Convert to fraction form
   20,391.19/31,196.81 = 31,196.81/x
3. Step 3: Cross multiply
   20,391.19x = 31,196.81 × 31,196.81
4. Step 4: Simplify right side
   20,391.19x = 973,241,110.16
5. Step 5: Solve for x
   x = 973,241,110.16/20,391.19
6. Step 6: Final answer
   x = 47,728.52