Finding the Fourth Proportional to 55,799.04, 83,698.71 and 13,679.31

Step by Step Solution

1. Step 1: Write the proportion equation
   55,799.04 : 83,698.71 = 13,679.31 : x
2. Step 2: Convert to fraction form
   55,799.04/83,698.71 = 13,679.31/x
3. Step 3: Cross multiply
   55,799.04x = 83,698.71 × 13,679.31
4. Step 4: Simplify right side
   55,799.04x = 1,144,940,600.69
5. Step 5: Solve for x
   x = 1,144,940,600.69/55,799.04
6. Step 6: Final answer
   x = 20,519.00