Finding the Fourth Proportional to 9,058.28, 13,641.83 and 7,974.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,058.28 : 13,641.83 = 7,974.60 : x
2. Step 2: Convert to fraction form
   9,058.28/13,641.83 = 7,974.60/x
3. Step 3: Cross multiply
   9,058.28x = 13,641.83 × 7,974.60
4. Step 4: Simplify right side
   9,058.28x = 108,788,137.52
5. Step 5: Solve for x
   x = 108,788,137.52/9,058.28
6. Step 6: Final answer
   x = 12,009.80