Finding the Fourth Proportional to 23,115.42, 31,900.10 and 13,046.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,115.42 : 31,900.10 = 13,046.31 : x
2. Step 2: Convert to fraction form
   23,115.42/31,900.10 = 13,046.31/x
3. Step 3: Cross multiply
   23,115.42x = 31,900.10 × 13,046.31
4. Step 4: Simplify right side
   23,115.42x = 416,178,528.40
5. Step 5: Solve for x
   x = 416,178,528.40/23,115.42
6. Step 6: Final answer
   x = 18,004.37