Finding the Fourth Proportional to 2,178.60, 3,269.28 and 1,255.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.60 : 3,269.28 = 1,255.98 : x
2. Step 2: Convert to fraction form
   2,178.60/3,269.28 = 1,255.98/x
3. Step 3: Cross multiply
   2,178.60x = 3,269.28 × 1,255.98
4. Step 4: Simplify right side
   2,178.60x = 4,106,150.29
5. Step 5: Solve for x
   x = 4,106,150.29/2,178.60
6. Step 6: Final answer
   x = 1,884.77