Finding the Fourth Proportional to 23,100.08, 31,878.09 and 12,489.69

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.08 : 31,878.09 = 12,489.69 : x
2. Step 2: Convert to fraction form
   23,100.08/31,878.09 = 12,489.69/x
3. Step 3: Cross multiply
   23,100.08x = 31,878.09 × 12,489.69
4. Step 4: Simplify right side
   23,100.08x = 398,147,461.89
5. Step 5: Solve for x
   x = 398,147,461.89/23,100.08
6. Step 6: Final answer
   x = 17,235.76