Finding the Fourth Proportional to 13,120.42, 19,685.32 and 5,620.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,120.42 : 19,685.32 = 5,620.83 : x
2. Step 2: Convert to fraction form
   13,120.42/19,685.32 = 5,620.83/x
3. Step 3: Cross multiply
   13,120.42x = 19,685.32 × 5,620.83
4. Step 4: Simplify right side
   13,120.42x = 110,647,738.79
5. Step 5: Solve for x
   x = 110,647,738.79/13,120.42
6. Step 6: Final answer
   x = 8,433.25