Finding the Fourth Proportional to 10,039.48, 13,854.11 and 5,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,039.48 : 13,854.11 = 5,790.72 : x
2. Step 2: Convert to fraction form
   10,039.48/13,854.11 = 5,790.72/x
3. Step 3: Cross multiply
   10,039.48x = 13,854.11 × 5,790.72
4. Step 4: Simplify right side
   10,039.48x = 80,225,271.86
5. Step 5: Solve for x
   x = 80,225,271.86/10,039.48
6. Step 6: Final answer
   x = 7,990.98