Finding the Fourth Proportional to 2,188.40, 3,281.46 and 1,077.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.40 : 3,281.46 = 1,077.35 : x
2. Step 2: Convert to fraction form
   2,188.40/3,281.46 = 1,077.35/x
3. Step 3: Cross multiply
   2,188.40x = 3,281.46 × 1,077.35
4. Step 4: Simplify right side
   2,188.40x = 3,535,280.93
5. Step 5: Solve for x
   x = 3,535,280.93/2,188.40
6. Step 6: Final answer
   x = 1,615.46