Finding the Fourth Proportional to 9,355.18, 12,912.86 and 5,530.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.18 : 12,912.86 = 5,530.36 : x
2. Step 2: Convert to fraction form
   9,355.18/12,912.86 = 5,530.36/x
3. Step 3: Cross multiply
   9,355.18x = 12,912.86 × 5,530.36
4. Step 4: Simplify right side
   9,355.18x = 71,412,764.43
5. Step 5: Solve for x
   x = 71,412,764.43/9,355.18
6. Step 6: Final answer
   x = 7,633.50