Finding the Fourth Proportional to 13,836.72, 20,742.72 and 5,065.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,836.72 : 20,742.72 = 5,065.68 : x
2. Step 2: Convert to fraction form
   13,836.72/20,742.72 = 5,065.68/x
3. Step 3: Cross multiply
   13,836.72x = 20,742.72 × 5,065.68
4. Step 4: Simplify right side
   13,836.72x = 105,075,981.85
5. Step 5: Solve for x
   x = 105,075,981.85/13,836.72
6. Step 6: Final answer
   x = 7,593.99