Finding the Third Proportional to 15,181.50 and 20,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,181.50 : 20,611.50 = 20,611.50 : x
2. Step 2: Convert to fraction form
   15,181.50/20,611.50 = 20,611.50/x
3. Step 3: Cross multiply
   15,181.50x = 20,611.50 × 20,611.50
4. Step 4: Simplify right side
   15,181.50x = 424,833,932.25
5. Step 5: Solve for x
   x = 424,833,932.25/15,181.50
6. Step 6: Final answer
   x = 27,983.66