Finding the Fourth Proportional to 8,974.47, 12,390.33 and 5,789.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,974.47 : 12,390.33 = 5,789.32 : x
2. Step 2: Convert to fraction form
   8,974.47/12,390.33 = 5,789.32/x
3. Step 3: Cross multiply
   8,974.47x = 12,390.33 × 5,789.32
4. Step 4: Simplify right side
   8,974.47x = 71,731,585.28
5. Step 5: Solve for x
   x = 71,731,585.28/8,974.47
6. Step 6: Final answer
   x = 7,992.85