Finding the Fourth Proportional to 9,379.02, 12,942.54 and 5,187

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.02 : 12,942.54 = 5,187 : x
2. Step 2: Convert to fraction form
   9,379.02/12,942.54 = 5,187/x
3. Step 3: Cross multiply
   9,379.02x = 12,942.54 × 5,187
4. Step 4: Simplify right side
   9,379.02x = 67,132,954.98
5. Step 5: Solve for x
   x = 67,132,954.98/9,379.02
6. Step 6: Final answer
   x = 7,157.78