Finding the Fourth Proportional to 7,128.71, 9,837.23 and 3,941.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.71 : 9,837.23 = 3,941.82 : x
2. Step 2: Convert to fraction form
   7,128.71/9,837.23 = 3,941.82/x
3. Step 3: Cross multiply
   7,128.71x = 9,837.23 × 3,941.82
4. Step 4: Simplify right side
   7,128.71x = 38,776,570.25
5. Step 5: Solve for x
   x = 38,776,570.25/7,128.71
6. Step 6: Final answer
   x = 5,439.49