Finding the Fourth Proportional to 9,854.42, 13,599.32 and 5,378.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,854.42 : 13,599.32 = 5,378.58 : x
2. Step 2: Convert to fraction form
   9,854.42/13,599.32 = 5,378.58/x
3. Step 3: Cross multiply
   9,854.42x = 13,599.32 × 5,378.58
4. Step 4: Simplify right side
   9,854.42x = 73,145,030.57
5. Step 5: Solve for x
   x = 73,145,030.57/9,854.42
6. Step 6: Final answer
   x = 7,422.56