Finding the Fourth Proportional to 10,406.61, 15,568.46 and 9,036.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,406.61 : 15,568.46 = 9,036.09 : x
2. Step 2: Convert to fraction form
   10,406.61/15,568.46 = 9,036.09/x
3. Step 3: Cross multiply
   10,406.61x = 15,568.46 × 9,036.09
4. Step 4: Simplify right side
   10,406.61x = 140,678,005.72
5. Step 5: Solve for x
   x = 140,678,005.72/10,406.61
6. Step 6: Final answer
   x = 13,518.14