Finding the Fourth Proportional to 10,003.72, 13,807.92 and 5,812.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,003.72 : 13,807.92 = 5,812.78 : x
2. Step 2: Convert to fraction form
   10,003.72/13,807.92 = 5,812.78/x
3. Step 3: Cross multiply
   10,003.72x = 13,807.92 × 5,812.78
4. Step 4: Simplify right side
   10,003.72x = 80,262,401.22
5. Step 5: Solve for x
   x = 80,262,401.22/10,003.72
6. Step 6: Final answer
   x = 8,023.26