Finding the Fourth Proportional to 10,391.48, 15,584.78 and 5,124.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.48 : 15,584.78 = 5,124.06 : x
2. Step 2: Convert to fraction form
   10,391.48/15,584.78 = 5,124.06/x
3. Step 3: Cross multiply
   10,391.48x = 15,584.78 × 5,124.06
4. Step 4: Simplify right side
   10,391.48x = 79,857,347.81
5. Step 5: Solve for x
   x = 79,857,347.81/10,391.48
6. Step 6: Final answer
   x = 7,684.89