Finding the Fourth Proportional to 5,311.34, 7,967.43 and 1,613.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,311.34 : 7,967.43 = 1,613.89 : x
2. Step 2: Convert to fraction form
   5,311.34/7,967.43 = 1,613.89/x
3. Step 3: Cross multiply
   5,311.34x = 7,967.43 × 1,613.89
4. Step 4: Simplify right side
   5,311.34x = 12,858,565.56
5. Step 5: Solve for x
   x = 12,858,565.56/5,311.34
6. Step 6: Final answer
   x = 2,420.97