Finding the Fourth Proportional to 2,235.30, 3,084.35 and 1,240.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,235.30 : 3,084.35 = 1,240.55 : x
2. Step 2: Convert to fraction form
   2,235.30/3,084.35 = 1,240.55/x
3. Step 3: Cross multiply
   2,235.30x = 3,084.35 × 1,240.55
4. Step 4: Simplify right side
   2,235.30x = 3,826,303.81
5. Step 5: Solve for x
   x = 3,826,303.81/2,235.30
6. Step 6: Final answer
   x = 1,711.77