Finding the Fourth Proportional to 55,199.67, 82,811.82 and 20,139.33

Step by Step Solution

1. Step 1: Write the proportion equation
   55,199.67 : 82,811.82 = 20,139.33 : x
2. Step 2: Convert to fraction form
   55,199.67/82,811.82 = 20,139.33/x
3. Step 3: Cross multiply
   55,199.67x = 82,811.82 × 20,139.33
4. Step 4: Simplify right side
   55,199.67x = 1,667,774,570.88
5. Step 5: Solve for x
   x = 1,667,774,570.88/55,199.67
6. Step 6: Final answer
   x = 30,213.49