Finding the Third Proportional to 13,215 and 28,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,215 : 28,879.50 = 28,879.50 : x
2. Step 2: Convert to fraction form
   13,215/28,879.50 = 28,879.50/x
3. Step 3: Cross multiply
   13,215x = 28,879.50 × 28,879.50
4. Step 4: Simplify right side
   13,215x = 834,025,520.25
5. Step 5: Solve for x
   x = 834,025,520.25/13,215
6. Step 6: Final answer
   x = 63,112.03