Finding the Fourth Proportional to 2,188.72, 3,020.48 and 1,244.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.72 : 3,020.48 = 1,244.55 : x
2. Step 2: Convert to fraction form
   2,188.72/3,020.48 = 1,244.55/x
3. Step 3: Cross multiply
   2,188.72x = 3,020.48 × 1,244.55
4. Step 4: Simplify right side
   2,188.72x = 3,759,141.50
5. Step 5: Solve for x
   x = 3,759,141.50/2,188.72
6. Step 6: Final answer
   x = 1,717.51