Finding the Fourth Proportional to 3,981.69, 5,475.06 and 3,538.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.69 : 5,475.06 = 3,538.80 : x
2. Step 2: Convert to fraction form
   3,981.69/5,475.06 = 3,538.80/x
3. Step 3: Cross multiply
   3,981.69x = 5,475.06 × 3,538.80
4. Step 4: Simplify right side
   3,981.69x = 19,375,142.33
5. Step 5: Solve for x
   x = 19,375,142.33/3,981.69
6. Step 6: Final answer
   x = 4,866.06