Finding the Fourth Proportional to 85,544.82, 128,308.59 and 30,136.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,544.82 : 128,308.59 = 30,136.50 : x
2. Step 2: Convert to fraction form
   85,544.82/128,308.59 = 30,136.50/x
3. Step 3: Cross multiply
   85,544.82x = 128,308.59 × 30,136.50
4. Step 4: Simplify right side
   85,544.82x = 3,866,771,822.54
5. Step 5: Solve for x
   x = 3,866,771,822.54/85,544.82
6. Step 6: Final answer
   x = 45,201.71