Finding the Fourth Proportional to 9,169.86, 12,654.37 and 5,190.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,169.86 : 12,654.37 = 5,190.98 : x
2. Step 2: Convert to fraction form
   9,169.86/12,654.37 = 5,190.98/x
3. Step 3: Cross multiply
   9,169.86x = 12,654.37 × 5,190.98
4. Step 4: Simplify right side
   9,169.86x = 65,688,581.58
5. Step 5: Solve for x
   x = 65,688,581.58/9,169.86
6. Step 6: Final answer
   x = 7,163.53