Finding the Fourth Proportional to 8,384.69, 11,571.56 and 5,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,384.69 : 11,571.56 = 5,406.72 : x
2. Step 2: Convert to fraction form
   8,384.69/11,571.56 = 5,406.72/x
3. Step 3: Cross multiply
   8,384.69x = 11,571.56 × 5,406.72
4. Step 4: Simplify right side
   8,384.69x = 62,564,157.85
5. Step 5: Solve for x
   x = 62,564,157.85/8,384.69
6. Step 6: Final answer
   x = 7,461.72