Finding the Fourth Proportional to 23,105.90, 31,886.15 and 13,034.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,105.90 : 31,886.15 = 13,034.31 : x
2. Step 2: Convert to fraction form
   23,105.90/31,886.15 = 13,034.31/x
3. Step 3: Cross multiply
   23,105.90x = 31,886.15 × 13,034.31
4. Step 4: Simplify right side
   23,105.90x = 415,613,898.63
5. Step 5: Solve for x
   x = 415,613,898.63/23,105.90
6. Step 6: Final answer
   x = 17,987.35