Finding the Third Proportional to 19,236 and 20,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,236 : 20,830.50 = 20,830.50 : x
2. Step 2: Convert to fraction form
   19,236/20,830.50 = 20,830.50/x
3. Step 3: Cross multiply
   19,236x = 20,830.50 × 20,830.50
4. Step 4: Simplify right side
   19,236x = 433,909,730.25
5. Step 5: Solve for x
   x = 433,909,730.25/19,236
6. Step 6: Final answer
   x = 22,557.17