Finding the Fourth Proportional to 9,112.29, 13,667.94 and 3,187.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.29 : 13,667.94 = 3,187.32 : x
2. Step 2: Convert to fraction form
   9,112.29/13,667.94 = 3,187.32/x
3. Step 3: Cross multiply
   9,112.29x = 13,667.94 × 3,187.32
4. Step 4: Simplify right side
   9,112.29x = 43,564,098.52
5. Step 5: Solve for x
   x = 43,564,098.52/9,112.29
6. Step 6: Final answer
   x = 4,780.81