Finding the Fourth Proportional to 2,508.23, 3,461.30 and 1,389.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.23 : 3,461.30 = 1,389.10 : x
2. Step 2: Convert to fraction form
   2,508.23/3,461.30 = 1,389.10/x
3. Step 3: Cross multiply
   2,508.23x = 3,461.30 × 1,389.10
4. Step 4: Simplify right side
   2,508.23x = 4,808,075.51
5. Step 5: Solve for x
   x = 4,808,075.51/2,508.23
6. Step 6: Final answer
   x = 1,916.92