Finding the Fourth Proportional to 12,406.56, 17,113.86 and 8,158.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.56 : 17,113.86 = 8,158.38 : x
2. Step 2: Convert to fraction form
   12,406.56/17,113.86 = 8,158.38/x
3. Step 3: Cross multiply
   12,406.56x = 17,113.86 × 8,158.38
4. Step 4: Simplify right side
   12,406.56x = 139,621,373.15
5. Step 5: Solve for x
   x = 139,621,373.15/12,406.56
6. Step 6: Final answer
   x = 11,253.83