Finding the Third Proportional to 21,192 and 28,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,192 : 28,748.50 = 28,748.50 : x
2. Step 2: Convert to fraction form
   21,192/28,748.50 = 28,748.50/x
3. Step 3: Cross multiply
   21,192x = 28,748.50 × 28,748.50
4. Step 4: Simplify right side
   21,192x = 826,476,252.25
5. Step 5: Solve for x
   x = 826,476,252.25/21,192
6. Step 6: Final answer
   x = 38,999.45