Finding the Third Proportional to 16,921.50 and 36,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,921.50 : 36,724.50 = 36,724.50 : x
2. Step 2: Convert to fraction form
   16,921.50/36,724.50 = 36,724.50/x
3. Step 3: Cross multiply
   16,921.50x = 36,724.50 × 36,724.50
4. Step 4: Simplify right side
   16,921.50x = 1,348,688,900.25
5. Step 5: Solve for x
   x = 1,348,688,900.25/16,921.50
6. Step 6: Final answer
   x = 79,702.68