Finding the Fourth Proportional to 9,436.78, 13,022.70 and 5,245

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.78 : 13,022.70 = 5,245 : x
2. Step 2: Convert to fraction form
   9,436.78/13,022.70 = 5,245/x
3. Step 3: Cross multiply
   9,436.78x = 13,022.70 × 5,245
4. Step 4: Simplify right side
   9,436.78x = 68,304,061.50
5. Step 5: Solve for x
   x = 68,304,061.50/9,436.78
6. Step 6: Final answer
   x = 7,238.07