Finding the Fourth Proportional to 57,710.42, 86,561.30 and 20,270.82

Step by Step Solution

1. Step 1: Write the proportion equation
   57,710.42 : 86,561.30 = 20,270.82 : x
2. Step 2: Convert to fraction form
   57,710.42/86,561.30 = 20,270.82/x
3. Step 3: Cross multiply
   57,710.42x = 86,561.30 × 20,270.82
4. Step 4: Simplify right side
   57,710.42x = 1,754,668,531.27
5. Step 5: Solve for x
   x = 1,754,668,531.27/57,710.42
6. Step 6: Final answer
   x = 30,404.71