Finding the Fourth Proportional to 13,435.61, 20,162.06 and 5,644.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,435.61 : 20,162.06 = 5,644.41 : x
2. Step 2: Convert to fraction form
   13,435.61/20,162.06 = 5,644.41/x
3. Step 3: Cross multiply
   13,435.61x = 20,162.06 × 5,644.41
4. Step 4: Simplify right side
   13,435.61x = 113,802,904.86
5. Step 5: Solve for x
   x = 113,802,904.86/13,435.61
6. Step 6: Final answer
   x = 8,470.25