Finding the Fourth Proportional to 2,391.31, 3,586.81 and 1,423.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.31 : 3,586.81 = 1,423.57 : x
2. Step 2: Convert to fraction form
   2,391.31/3,586.81 = 1,423.57/x
3. Step 3: Cross multiply
   2,391.31x = 3,586.81 × 1,423.57
4. Step 4: Simplify right side
   2,391.31x = 5,106,075.11
5. Step 5: Solve for x
   x = 5,106,075.11/2,391.31
6. Step 6: Final answer
   x = 2,135.26