Finding the Fourth Proportional to 55,805.94, 83,707.15 and 13,686.15

Step by Step Solution

1. Step 1: Write the proportion equation
   55,805.94 : 83,707.15 = 13,686.15 : x
2. Step 2: Convert to fraction form
   55,805.94/83,707.15 = 13,686.15/x
3. Step 3: Cross multiply
   55,805.94x = 83,707.15 × 13,686.15
4. Step 4: Simplify right side
   55,805.94x = 1,145,628,610.97
5. Step 5: Solve for x
   x = 1,145,628,610.97/55,805.94
6. Step 6: Final answer
   x = 20,528.79