Finding the Fourth Proportional to 9,355.60, 12,910.40 and 5,576.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.60 : 12,910.40 = 5,576.81 : x
2. Step 2: Convert to fraction form
   9,355.60/12,910.40 = 5,576.81/x
3. Step 3: Cross multiply
   9,355.60x = 12,910.40 × 5,576.81
4. Step 4: Simplify right side
   9,355.60x = 71,998,873.13
5. Step 5: Solve for x
   x = 71,998,873.13/9,355.60
6. Step 6: Final answer
   x = 7,695.81