Finding the Fourth Proportional to 3,870.46, 5,340.31 and 2,613.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.46 : 5,340.31 = 2,613.84 : x
2. Step 2: Convert to fraction form
   3,870.46/5,340.31 = 2,613.84/x
3. Step 3: Cross multiply
   3,870.46x = 5,340.31 × 2,613.84
4. Step 4: Simplify right side
   3,870.46x = 13,958,715.89
5. Step 5: Solve for x
   x = 13,958,715.89/3,870.46
6. Step 6: Final answer
   x = 3,606.47