Finding the Third Proportional to 21,136 and 31,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,136 : 31,091.50 = 31,091.50 : x
2. Step 2: Convert to fraction form
   21,136/31,091.50 = 31,091.50/x
3. Step 3: Cross multiply
   21,136x = 31,091.50 × 31,091.50
4. Step 4: Simplify right side
   21,136x = 966,681,372.25
5. Step 5: Solve for x
   x = 966,681,372.25/21,136
6. Step 6: Final answer
   x = 45,736.25