Finding the Fourth Proportional to 7,042.38, 9,718.77 and 3,898.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.38 : 9,718.77 = 3,898.59 : x
2. Step 2: Convert to fraction form
   7,042.38/9,718.77 = 3,898.59/x
3. Step 3: Cross multiply
   7,042.38x = 9,718.77 × 3,898.59
4. Step 4: Simplify right side
   7,042.38x = 37,889,499.53
5. Step 5: Solve for x
   x = 37,889,499.53/7,042.38
6. Step 6: Final answer
   x = 5,380.21