Finding the Fourth Proportional to 9,845.80, 13,586.98 and 5,369.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,845.80 : 13,586.98 = 5,369.55 : x
2. Step 2: Convert to fraction form
   9,845.80/13,586.98 = 5,369.55/x
3. Step 3: Cross multiply
   9,845.80x = 13,586.98 × 5,369.55
4. Step 4: Simplify right side
   9,845.80x = 72,955,968.46
5. Step 5: Solve for x
   x = 72,955,968.46/9,845.80
6. Step 6: Final answer
   x = 7,409.86