Finding the Fourth Proportional to 12,817.41, 17,688 and 7,151.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.41 : 17,688 = 7,151.81 : x
2. Step 2: Convert to fraction form
   12,817.41/17,688 = 7,151.81/x
3. Step 3: Cross multiply
   12,817.41x = 17,688 × 7,151.81
4. Step 4: Simplify right side
   12,817.41x = 126,501,259.50
5. Step 5: Solve for x
   x = 126,501,259.50/12,817.41
6. Step 6: Final answer
   x = 9,869.49