Finding the Fourth Proportional to 55,619.67, 83,428.80 and 13,500.09

Step by Step Solution

1. Step 1: Write the proportion equation
   55,619.67 : 83,428.80 = 13,500.09 : x
2. Step 2: Convert to fraction form
   55,619.67/83,428.80 = 13,500.09/x
3. Step 3: Cross multiply
   55,619.67x = 83,428.80 × 13,500.09
4. Step 4: Simplify right side
   55,619.67x = 1,126,296,308.59
5. Step 5: Solve for x
   x = 1,126,296,308.59/55,619.67
6. Step 6: Final answer
   x = 20,249.96