Finding the Fourth Proportional to 2,551.34, 3,824.58 and 818.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.34 : 3,824.58 = 818.75 : x
2. Step 2: Convert to fraction form
   2,551.34/3,824.58 = 818.75/x
3. Step 3: Cross multiply
   2,551.34x = 3,824.58 × 818.75
4. Step 4: Simplify right side
   2,551.34x = 3,131,374.88
5. Step 5: Solve for x
   x = 3,131,374.88/2,551.34
6. Step 6: Final answer
   x = 1,227.35