Finding the Fourth Proportional to 2,503.31, 3,753.59 and 859.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.31 : 3,753.59 = 859.28 : x
2. Step 2: Convert to fraction form
   2,503.31/3,753.59 = 859.28/x
3. Step 3: Cross multiply
   2,503.31x = 3,753.59 × 859.28
4. Step 4: Simplify right side
   2,503.31x = 3,225,361.75
5. Step 5: Solve for x
   x = 3,225,361.75/2,503.31
6. Step 6: Final answer
   x = 1,288.44