Finding the Fourth Proportional to 9,355.25, 12,897.83 and 7,755.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.25 : 12,897.83 = 7,755.86 : x
2. Step 2: Convert to fraction form
   9,355.25/12,897.83 = 7,755.86/x
3. Step 3: Cross multiply
   9,355.25x = 12,897.83 × 7,755.86
4. Step 4: Simplify right side
   9,355.25x = 100,033,718.68
5. Step 5: Solve for x
   x = 100,033,718.68/9,355.25
6. Step 6: Final answer
   x = 10,692.80