Finding the Fourth Proportional to 5,613.34, 8,422.86 and 3,980.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,613.34 : 8,422.86 = 3,980.38 : x
2. Step 2: Convert to fraction form
   5,613.34/8,422.86 = 3,980.38/x
3. Step 3: Cross multiply
   5,613.34x = 8,422.86 × 3,980.38
4. Step 4: Simplify right side
   5,613.34x = 33,526,183.49
5. Step 5: Solve for x
   x = 33,526,183.49/5,613.34
6. Step 6: Final answer
   x = 5,972.59