Finding the Fourth Proportional to 10,556.69, 15,838.85 and 4,939.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,556.69 : 15,838.85 = 4,939.31 : x
2. Step 2: Convert to fraction form
   10,556.69/15,838.85 = 4,939.31/x
3. Step 3: Cross multiply
   10,556.69x = 15,838.85 × 4,939.31
4. Step 4: Simplify right side
   10,556.69x = 78,233,042.14
5. Step 5: Solve for x
   x = 78,233,042.14/10,556.69
6. Step 6: Final answer
   x = 7,410.76