Finding the Fourth Proportional to 13,436.76, 20,141.63 and 5,545.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,436.76 : 20,141.63 = 5,545.05 : x
2. Step 2: Convert to fraction form
   13,436.76/20,141.63 = 5,545.05/x
3. Step 3: Cross multiply
   13,436.76x = 20,141.63 × 5,545.05
4. Step 4: Simplify right side
   13,436.76x = 111,686,345.43
5. Step 5: Solve for x
   x = 111,686,345.43/13,436.76
6. Step 6: Final answer
   x = 8,312.00