Finding the Third Proportional to 16,520.20 and 35,728.59

Step by Step Solution

1. Step 1: Write the proportion equation
   16,520.20 : 35,728.59 = 35,728.59 : x
2. Step 2: Convert to fraction form
   16,520.20/35,728.59 = 35,728.59/x
3. Step 3: Cross multiply
   16,520.20x = 35,728.59 × 35,728.59
4. Step 4: Simplify right side
   16,520.20x = 1,276,532,411.35
5. Step 5: Solve for x
   x = 1,276,532,411.35/16,520.20
6. Step 6: Final answer
   x = 77,270.99