Finding the Fourth Proportional to 9,357.59, 12,914.43 and 5,378.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357.59 : 12,914.43 = 5,378.87 : x
2. Step 2: Convert to fraction form
   9,357.59/12,914.43 = 5,378.87/x
3. Step 3: Cross multiply
   9,357.59x = 12,914.43 × 5,378.87
4. Step 4: Simplify right side
   9,357.59x = 69,465,040.09
5. Step 5: Solve for x
   x = 69,465,040.09/9,357.59
6. Step 6: Final answer
   x = 7,423.39