Finding the Fourth Proportional to 55,171.50, 82,758.93 and 13,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,171.50 : 82,758.93 = 13,618.50 : x
2. Step 2: Convert to fraction form
   55,171.50/82,758.93 = 13,618.50/x
3. Step 3: Cross multiply
   55,171.50x = 82,758.93 × 13,618.50
4. Step 4: Simplify right side
   55,171.50x = 1,127,052,488.21
5. Step 5: Solve for x
   x = 1,127,052,488.21/55,171.50
6. Step 6: Final answer
   x = 20,428.16