Finding the Fourth Proportional to 13,633.86, 20,436.18 and 7,053.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,633.86 : 20,436.18 = 7,053.42 : x
2. Step 2: Convert to fraction form
   13,633.86/20,436.18 = 7,053.42/x
3. Step 3: Cross multiply
   13,633.86x = 20,436.18 × 7,053.42
4. Step 4: Simplify right side
   13,633.86x = 144,144,960.74
5. Step 5: Solve for x
   x = 144,144,960.74/13,633.86
6. Step 6: Final answer
   x = 10,572.57