Finding the Fourth Proportional to 9,379.16, 12,943.08 and 5,187.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.16 : 12,943.08 = 5,187.38 : x
2. Step 2: Convert to fraction form
   9,379.16/12,943.08 = 5,187.38/x
3. Step 3: Cross multiply
   9,379.16x = 12,943.08 × 5,187.38
4. Step 4: Simplify right side
   9,379.16x = 67,140,674.33
5. Step 5: Solve for x
   x = 67,140,674.33/9,379.16
6. Step 6: Final answer
   x = 7,158.50