Finding the Fourth Proportional to 9,355.87, 12,906.70 and 5,576.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.87 : 12,906.70 = 5,576.88 : x
2. Step 2: Convert to fraction form
   9,355.87/12,906.70 = 5,576.88/x
3. Step 3: Cross multiply
   9,355.87x = 12,906.70 × 5,576.88
4. Step 4: Simplify right side
   9,355.87x = 71,979,103.15
5. Step 5: Solve for x
   x = 71,979,103.15/9,355.87
6. Step 6: Final answer
   x = 7,693.47