Finding the Fourth Proportional to 12,271.06, 18,312.40 and 10,958.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,271.06 : 18,312.40 = 10,958.86 : x
2. Step 2: Convert to fraction form
   12,271.06/18,312.40 = 10,958.86/x
3. Step 3: Cross multiply
   12,271.06x = 18,312.40 × 10,958.86
4. Step 4: Simplify right side
   12,271.06x = 200,683,027.86
5. Step 5: Solve for x
   x = 200,683,027.86/12,271.06
6. Step 6: Final answer
   x = 16,354.17