Finding the Fourth Proportional to 9,010.78, 12,436.95 and 5,285.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,010.78 : 12,436.95 = 5,285.98 : x
2. Step 2: Convert to fraction form
   9,010.78/12,436.95 = 5,285.98/x
3. Step 3: Cross multiply
   9,010.78x = 12,436.95 × 5,285.98
4. Step 4: Simplify right side
   9,010.78x = 65,741,468.96
5. Step 5: Solve for x
   x = 65,741,468.96/9,010.78
6. Step 6: Final answer
   x = 7,295.87