Finding the Fourth Proportional to 9,854.39, 13,598.96 and 5,378.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,854.39 : 13,598.96 = 5,378.18 : x
2. Step 2: Convert to fraction form
   9,854.39/13,598.96 = 5,378.18/x
3. Step 3: Cross multiply
   9,854.39x = 13,598.96 × 5,378.18
4. Step 4: Simplify right side
   9,854.39x = 73,137,559.81
5. Step 5: Solve for x
   x = 73,137,559.81/9,854.39
6. Step 6: Final answer
   x = 7,421.83