Finding the Fourth Proportional to 8,288.73, 12,428.78 and 3,090.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,288.73 : 12,428.78 = 3,090.33 : x
2. Step 2: Convert to fraction form
   8,288.73/12,428.78 = 3,090.33/x
3. Step 3: Cross multiply
   8,288.73x = 12,428.78 × 3,090.33
4. Step 4: Simplify right side
   8,288.73x = 38,409,016.25
5. Step 5: Solve for x
   x = 38,409,016.25/8,288.73
6. Step 6: Final answer
   x = 4,633.88