Finding the Fourth Proportional to 13,424.12, 20,128.22 and 4,061.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,424.12 : 20,128.22 = 4,061.30 : x
2. Step 2: Convert to fraction form
   13,424.12/20,128.22 = 4,061.30/x
3. Step 3: Cross multiply
   13,424.12x = 20,128.22 × 4,061.30
4. Step 4: Simplify right side
   13,424.12x = 81,746,739.89
5. Step 5: Solve for x
   x = 81,746,739.89/13,424.12
6. Step 6: Final answer
   x = 6,089.54