Finding the Fourth Proportional to 10,499.49, 15,735.06 and 5,819.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.49 : 15,735.06 = 5,819.31 : x
2. Step 2: Convert to fraction form
   10,499.49/15,735.06 = 5,819.31/x
3. Step 3: Cross multiply
   10,499.49x = 15,735.06 × 5,819.31
4. Step 4: Simplify right side
   10,499.49x = 91,567,192.01
5. Step 5: Solve for x
   x = 91,567,192.01/10,499.49
6. Step 6: Final answer
   x = 8,721.11