Finding the Third Proportional to 21,190.50 and 28,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,190.50 : 28,120.50 = 28,120.50 : x
2. Step 2: Convert to fraction form
   21,190.50/28,120.50 = 28,120.50/x
3. Step 3: Cross multiply
   21,190.50x = 28,120.50 × 28,120.50
4. Step 4: Simplify right side
   21,190.50x = 790,762,520.25
5. Step 5: Solve for x
   x = 790,762,520.25/21,190.50
6. Step 6: Final answer
   x = 37,316.84