Finding the Fourth Proportional to 1,613.34, 2,211.90 and 1,584.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.34 : 2,211.90 = 1,584.18 : x
2. Step 2: Convert to fraction form
   1,613.34/2,211.90 = 1,584.18/x
3. Step 3: Cross multiply
   1,613.34x = 2,211.90 × 1,584.18
4. Step 4: Simplify right side
   1,613.34x = 3,504,047.74
5. Step 5: Solve for x
   x = 3,504,047.74/1,613.34
6. Step 6: Final answer
   x = 2,171.92