Finding the Fourth Proportional to 9,868.38, 13,619.31 and 5,392.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.38 : 13,619.31 = 5,392.81 : x
2. Step 2: Convert to fraction form
   9,868.38/13,619.31 = 5,392.81/x
3. Step 3: Cross multiply
   9,868.38x = 13,619.31 × 5,392.81
4. Step 4: Simplify right side
   9,868.38x = 73,446,351.16
5. Step 5: Solve for x
   x = 73,446,351.16/9,868.38
6. Step 6: Final answer
   x = 7,442.59