Finding the Fourth Proportional to 9,868.42, 13,618.40 and 5,619.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.42 : 13,618.40 = 5,619.48 : x
2. Step 2: Convert to fraction form
   9,868.42/13,618.40 = 5,619.48/x
3. Step 3: Cross multiply
   9,868.42x = 13,618.40 × 5,619.48
4. Step 4: Simplify right side
   9,868.42x = 76,528,349.89
5. Step 5: Solve for x
   x = 76,528,349.89/9,868.42
6. Step 6: Final answer
   x = 7,754.87