Finding the Fourth Proportional to 9,854.71, 13,599.39 and 5,378.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,854.71 : 13,599.39 = 5,378.42 : x
2. Step 2: Convert to fraction form
   9,854.71/13,599.39 = 5,378.42/x
3. Step 3: Cross multiply
   9,854.71x = 13,599.39 × 5,378.42
4. Step 4: Simplify right side
   9,854.71x = 73,143,265.16
5. Step 5: Solve for x
   x = 73,143,265.16/9,854.71
6. Step 6: Final answer
   x = 7,422.17