Finding the Fourth Proportional to 9,036.87, 12,469.40 and 5,677.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,036.87 : 12,469.40 = 5,677.31 : x
2. Step 2: Convert to fraction form
   9,036.87/12,469.40 = 5,677.31/x
3. Step 3: Cross multiply
   9,036.87x = 12,469.40 × 5,677.31
4. Step 4: Simplify right side
   9,036.87x = 70,792,605.34
5. Step 5: Solve for x
   x = 70,792,605.34/9,036.87
6. Step 6: Final answer
   x = 7,833.75