Finding the Third Proportional to 21,513.75 and 31,419.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,513.75 : 31,419.75 = 31,419.75 : x
2. Step 2: Convert to fraction form
   21,513.75/31,419.75 = 31,419.75/x
3. Step 3: Cross multiply
   21,513.75x = 31,419.75 × 31,419.75
4. Step 4: Simplify right side
   21,513.75x = 987,200,690.06
5. Step 5: Solve for x
   x = 987,200,690.06/21,513.75
6. Step 6: Final answer
   x = 45,886.96