Finding the Third Proportional to 21,391 and 31,114.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,391 : 31,114.50 = 31,114.50 : x
2. Step 2: Convert to fraction form
   21,391/31,114.50 = 31,114.50/x
3. Step 3: Cross multiply
   21,391x = 31,114.50 × 31,114.50
4. Step 4: Simplify right side
   21,391x = 968,112,110.25
5. Step 5: Solve for x
   x = 968,112,110.25/21,391
6. Step 6: Final answer
   x = 45,257.92