Finding the Fourth Proportional to 20,499.38, 30,748.52 and 5,707.70

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.38 : 30,748.52 = 5,707.70 : x
2. Step 2: Convert to fraction form
   20,499.38/30,748.52 = 5,707.70/x
3. Step 3: Cross multiply
   20,499.38x = 30,748.52 × 5,707.70
4. Step 4: Simplify right side
   20,499.38x = 175,503,327.60
5. Step 5: Solve for x
   x = 175,503,327.60/20,499.38
6. Step 6: Final answer
   x = 8,561.40