Finding the Third Proportional to 21,636 and 28,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,636 : 28,930.50 = 28,930.50 : x
2. Step 2: Convert to fraction form
   21,636/28,930.50 = 28,930.50/x
3. Step 3: Cross multiply
   21,636x = 28,930.50 × 28,930.50
4. Step 4: Simplify right side
   21,636x = 836,973,830.25
5. Step 5: Solve for x
   x = 836,973,830.25/21,636
6. Step 6: Final answer
   x = 38,684.31