Finding the Fourth Proportional to 9,236.80, 12,755.72 and 7,902.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,236.80 : 12,755.72 = 7,902.72 : x
2. Step 2: Convert to fraction form
   9,236.80/12,755.72 = 7,902.72/x
3. Step 3: Cross multiply
   9,236.80x = 12,755.72 × 7,902.72
4. Step 4: Simplify right side
   9,236.80x = 100,804,883.56
5. Step 5: Solve for x
   x = 100,804,883.56/9,236.80
6. Step 6: Final answer
   x = 10,913.40