Finding the Fourth Proportional to 13,636.86, 20,341.71 and 13,411.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,636.86 : 20,341.71 = 13,411.08 : x
2. Step 2: Convert to fraction form
   13,636.86/20,341.71 = 13,411.08/x
3. Step 3: Cross multiply
   13,636.86x = 20,341.71 × 13,411.08
4. Step 4: Simplify right side
   13,636.86x = 272,804,300.15
5. Step 5: Solve for x
   x = 272,804,300.15/13,636.86
6. Step 6: Final answer
   x = 20,004.92