Finding the Fourth Proportional to 31,139.52, 46,714.56 and 13,608.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139.52 : 46,714.56 = 13,608.96 : x
2. Step 2: Convert to fraction form
   31,139.52/46,714.56 = 13,608.96/x
3. Step 3: Cross multiply
   31,139.52x = 46,714.56 × 13,608.96
4. Step 4: Simplify right side
   31,139.52x = 635,736,578.46
5. Step 5: Solve for x
   x = 635,736,578.46/31,139.52
6. Step 6: Final answer
   x = 20,415.75