Finding the Fourth Proportional to 13,730.83, 20,557.33 and 9,036.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,730.83 : 20,557.33 = 9,036.72 : x
2. Step 2: Convert to fraction form
   13,730.83/20,557.33 = 9,036.72/x
3. Step 3: Cross multiply
   13,730.83x = 20,557.33 × 9,036.72
4. Step 4: Simplify right side
   13,730.83x = 185,770,812.57
5. Step 5: Solve for x
   x = 185,770,812.57/13,730.83
6. Step 6: Final answer
   x = 13,529.47