Finding the Fourth Proportional to 8,390.69, 11,591.71 and 5,526.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,390.69 : 11,591.71 = 5,526.22 : x
2. Step 2: Convert to fraction form
   8,390.69/11,591.71 = 5,526.22/x
3. Step 3: Cross multiply
   8,390.69x = 11,591.71 × 5,526.22
4. Step 4: Simplify right side
   8,390.69x = 64,058,339.64
5. Step 5: Solve for x
   x = 64,058,339.64/8,390.69
6. Step 6: Final answer
   x = 7,634.45