Finding the Fourth Proportional to 13,658.56, 20,465.58 and 5,329.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,658.56 : 20,465.58 = 5,329.12 : x
2. Step 2: Convert to fraction form
   13,658.56/20,465.58 = 5,329.12/x
3. Step 3: Cross multiply
   13,658.56x = 20,465.58 × 5,329.12
4. Step 4: Simplify right side
   13,658.56x = 109,063,531.69
5. Step 5: Solve for x
   x = 109,063,531.69/13,658.56
6. Step 6: Final answer
   x = 7,984.99