Finding the Fourth Proportional to 13,109.88, 19,664.28 and 5,714.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.88 : 19,664.28 = 5,714.31 : x
2. Step 2: Convert to fraction form
   13,109.88/19,664.28 = 5,714.31/x
3. Step 3: Cross multiply
   13,109.88x = 19,664.28 × 5,714.31
4. Step 4: Simplify right side
   13,109.88x = 112,367,791.85
5. Step 5: Solve for x
   x = 112,367,791.85/13,109.88
6. Step 6: Final answer
   x = 8,571.23