Finding the Fourth Proportional to 20,498.86, 30,748.56 and 5,707.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,498.86 : 30,748.56 = 5,707.42 : x
2. Step 2: Convert to fraction form
   20,498.86/30,748.56 = 5,707.42/x
3. Step 3: Cross multiply
   20,498.86x = 30,748.56 × 5,707.42
4. Step 4: Simplify right side
   20,498.86x = 175,494,946.32
5. Step 5: Solve for x
   x = 175,494,946.32/20,498.86
6. Step 6: Final answer
   x = 8,561.21