Finding the Fourth Proportional to 9,761.78, 13,471.16 and 5,285.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,761.78 : 13,471.16 = 5,285.41 : x
2. Step 2: Convert to fraction form
   9,761.78/13,471.16 = 5,285.41/x
3. Step 3: Cross multiply
   9,761.78x = 13,471.16 × 5,285.41
4. Step 4: Simplify right side
   9,761.78x = 71,200,577.35
5. Step 5: Solve for x
   x = 71,200,577.35/9,761.78
6. Step 6: Final answer
   x = 7,293.81