Finding the Fourth Proportional to 2,572.56, 3,855.60 and 1,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.56 : 3,855.60 = 1,255.50 : x
2. Step 2: Convert to fraction form
   2,572.56/3,855.60 = 1,255.50/x
3. Step 3: Cross multiply
   2,572.56x = 3,855.60 × 1,255.50
4. Step 4: Simplify right side
   2,572.56x = 4,840,705.80
5. Step 5: Solve for x
   x = 4,840,705.80/2,572.56
6. Step 6: Final answer
   x = 1,881.67