Finding the Fourth Proportional to 9,036.94, 12,478.67 and 5,685.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,036.94 : 12,478.67 = 5,685.36 : x
2. Step 2: Convert to fraction form
   9,036.94/12,478.67 = 5,685.36/x
3. Step 3: Cross multiply
   9,036.94x = 12,478.67 × 5,685.36
4. Step 4: Simplify right side
   9,036.94x = 70,945,731.27
5. Step 5: Solve for x
   x = 70,945,731.27/9,036.94
6. Step 6: Final answer
   x = 7,850.64