Finding the Fourth Proportional to 2,389.91, 3,588.90 and 1,558.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.91 : 3,588.90 = 1,558.38 : x
2. Step 2: Convert to fraction form
   2,389.91/3,588.90 = 1,558.38/x
3. Step 3: Cross multiply
   2,389.91x = 3,588.90 × 1,558.38
4. Step 4: Simplify right side
   2,389.91x = 5,592,869.98
5. Step 5: Solve for x
   x = 5,592,869.98/2,389.91
6. Step 6: Final answer
   x = 2,340.21