Finding the Fourth Proportional to 5,556.47, 7,657.31 and 3,981.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,556.47 : 7,657.31 = 3,981.83 : x
2. Step 2: Convert to fraction form
   5,556.47/7,657.31 = 3,981.83/x
3. Step 3: Cross multiply
   5,556.47x = 7,657.31 × 3,981.83
4. Step 4: Simplify right side
   5,556.47x = 30,490,048.48
5. Step 5: Solve for x
   x = 30,490,048.48/5,556.47
6. Step 6: Final answer
   x = 5,487.31