Finding the Fourth Proportional to 2,507.96, 3,461.06 and 1,389.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.96 : 3,461.06 = 1,389.00 : x
2. Step 2: Convert to fraction form
   2,507.96/3,461.06 = 1,389.00/x
3. Step 3: Cross multiply
   2,507.96x = 3,461.06 × 1,389.00
4. Step 4: Simplify right side
   2,507.96x = 4,807,428.79
5. Step 5: Solve for x
   x = 4,807,428.79/2,507.96
6. Step 6: Final answer
   x = 1,916.87