Finding the Fourth Proportional to 9,106.35, 12,567.69 and 5,571.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,106.35 : 12,567.69 = 5,571.90 : x
2. Step 2: Convert to fraction form
   9,106.35/12,567.69 = 5,571.90/x
3. Step 3: Cross multiply
   9,106.35x = 12,567.69 × 5,571.90
4. Step 4: Simplify right side
   9,106.35x = 70,025,911.91
5. Step 5: Solve for x
   x = 70,025,911.91/9,106.35
6. Step 6: Final answer
   x = 7,689.79