Finding the Fourth Proportional to 2,346.42, 3,519.15 and 866.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,346.42 : 3,519.15 = 866.55 : x
2. Step 2: Convert to fraction form
   2,346.42/3,519.15 = 866.55/x
3. Step 3: Cross multiply
   2,346.42x = 3,519.15 × 866.55
4. Step 4: Simplify right side
   2,346.42x = 3,049,519.43
5. Step 5: Solve for x
   x = 3,049,519.43/2,346.42
6. Step 6: Final answer
   x = 1,299.65