Finding the Fourth Proportional to 7,042.56, 9,718.29 and 3,898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.56 : 9,718.29 = 3,898.50 : x
2. Step 2: Convert to fraction form
   7,042.56/9,718.29 = 3,898.50/x
3. Step 3: Cross multiply
   7,042.56x = 9,718.29 × 3,898.50
4. Step 4: Simplify right side
   7,042.56x = 37,886,753.57
5. Step 5: Solve for x
   x = 37,886,753.57/7,042.56
6. Step 6: Final answer
   x = 5,379.68