Finding the Fourth Proportional to 2,164.80, 3,244.42 and 1,240.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.80 : 3,244.42 = 1,240.86 : x
2. Step 2: Convert to fraction form
   2,164.80/3,244.42 = 1,240.86/x
3. Step 3: Cross multiply
   2,164.80x = 3,244.42 × 1,240.86
4. Step 4: Simplify right side
   2,164.80x = 4,025,871.00
5. Step 5: Solve for x
   x = 4,025,871.00/2,164.80
6. Step 6: Final answer
   x = 1,859.70