Finding the Fourth Proportional to 3,869.78, 5,799.80 and 3,558.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.78 : 5,799.80 = 3,558.74 : x
2. Step 2: Convert to fraction form
   3,869.78/5,799.80 = 3,558.74/x
3. Step 3: Cross multiply
   3,869.78x = 5,799.80 × 3,558.74
4. Step 4: Simplify right side
   3,869.78x = 20,639,960.15
5. Step 5: Solve for x
   x = 20,639,960.15/3,869.78
6. Step 6: Final answer
   x = 5,333.63