Finding the Fourth Proportional to 20,562.16, 30,816.96 and 17,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,562.16 : 30,816.96 = 17,788.72 : x
2. Step 2: Convert to fraction form
   20,562.16/30,816.96 = 17,788.72/x
3. Step 3: Cross multiply
   20,562.16x = 30,816.96 × 17,788.72
4. Step 4: Simplify right side
   20,562.16x = 548,194,272.69
5. Step 5: Solve for x
   x = 548,194,272.69/20,562.16
6. Step 6: Final answer
   x = 26,660.34