Finding the Fourth Proportional to 9,166.86, 12,650.15 and 5,187.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,166.86 : 12,650.15 = 5,187.87 : x
2. Step 2: Convert to fraction form
   9,166.86/12,650.15 = 5,187.87/x
3. Step 3: Cross multiply
   9,166.86x = 12,650.15 × 5,187.87
4. Step 4: Simplify right side
   9,166.86x = 65,627,333.68
5. Step 5: Solve for x
   x = 65,627,333.68/9,166.86
6. Step 6: Final answer
   x = 7,159.19