Finding the Fourth Proportional to 30,568.70, 42,184.27 and 17,139.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,568.70 : 42,184.27 = 17,139.91 : x
2. Step 2: Convert to fraction form
   30,568.70/42,184.27 = 17,139.91/x
3. Step 3: Cross multiply
   30,568.70x = 42,184.27 × 17,139.91
4. Step 4: Simplify right side
   30,568.70x = 723,034,591.22
5. Step 5: Solve for x
   x = 723,034,591.22/30,568.70
6. Step 6: Final answer
   x = 23,652.78