Finding the Fourth Proportional to 2,617.65, 3,923.46 and 1,056.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.65 : 3,923.46 = 1,056.69 : x
2. Step 2: Convert to fraction form
   2,617.65/3,923.46 = 1,056.69/x
3. Step 3: Cross multiply
   2,617.65x = 3,923.46 × 1,056.69
4. Step 4: Simplify right side
   2,617.65x = 4,145,880.95
5. Step 5: Solve for x
   x = 4,145,880.95/2,617.65
6. Step 6: Final answer
   x = 1,583.82