Finding the Third Proportional to 21,291.75 and 31,938.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,291.75 : 31,938.75 = 31,938.75 : x
2. Step 2: Convert to fraction form
   21,291.75/31,938.75 = 31,938.75/x
3. Step 3: Cross multiply
   21,291.75x = 31,938.75 × 31,938.75
4. Step 4: Simplify right side
   21,291.75x = 1,020,083,751.56
5. Step 5: Solve for x
   x = 1,020,083,751.56/21,291.75
6. Step 6: Final answer
   x = 47,909.81