Finding the Fourth Proportional to 9,355.92, 12,910.50 and 5,377.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.92 : 12,910.50 = 5,377.02 : x
2. Step 2: Convert to fraction form
   9,355.92/12,910.50 = 5,377.02/x
3. Step 3: Cross multiply
   9,355.92x = 12,910.50 × 5,377.02
4. Step 4: Simplify right side
   9,355.92x = 69,420,016.71
5. Step 5: Solve for x
   x = 69,420,016.71/9,355.92
6. Step 6: Final answer
   x = 7,419.90