Finding the Fourth Proportional to 10,309.41, 15,478.56 and 5,316.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,309.41 : 15,478.56 = 5,316.03 : x
2. Step 2: Convert to fraction form
   10,309.41/15,478.56 = 5,316.03/x
3. Step 3: Cross multiply
   10,309.41x = 15,478.56 × 5,316.03
4. Step 4: Simplify right side
   10,309.41x = 82,284,489.32
5. Step 5: Solve for x
   x = 82,284,489.32/10,309.41
6. Step 6: Final answer
   x = 7,981.49