Finding the Fourth Proportional to 20,917.02, 28,825.59 and 20,532.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,917.02 : 28,825.59 = 20,532.72 : x
2. Step 2: Convert to fraction form
   20,917.02/28,825.59 = 20,532.72/x
3. Step 3: Cross multiply
   20,917.02x = 28,825.59 × 20,532.72
4. Step 4: Simplify right side
   20,917.02x = 591,867,768.30
5. Step 5: Solve for x
   x = 591,867,768.30/20,917.02
6. Step 6: Final answer
   x = 28,295.99