Finding the Fourth Proportional to 2,499.28, 3,748.48 and 855.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.28 : 3,748.48 = 855.59 : x
2. Step 2: Convert to fraction form
   2,499.28/3,748.48 = 855.59/x
3. Step 3: Cross multiply
   2,499.28x = 3,748.48 × 855.59
4. Step 4: Simplify right side
   2,499.28x = 3,207,141.12
5. Step 5: Solve for x
   x = 3,207,141.12/2,499.28
6. Step 6: Final answer
   x = 1,283.23