Finding the Fourth Proportional to 2,503.56, 3,753.76 and 859.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.56 : 3,753.76 = 859.96 : x
2. Step 2: Convert to fraction form
   2,503.56/3,753.76 = 859.96/x
3. Step 3: Cross multiply
   2,503.56x = 3,753.76 × 859.96
4. Step 4: Simplify right side
   2,503.56x = 3,228,083.45
5. Step 5: Solve for x
   x = 3,228,083.45/2,503.56
6. Step 6: Final answer
   x = 1,289.40