Finding the Fourth Proportional to 2,506.30, 3,458.43 and 1,387.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.30 : 3,458.43 = 1,387.06 : x
2. Step 2: Convert to fraction form
   2,506.30/3,458.43 = 1,387.06/x
3. Step 3: Cross multiply
   2,506.30x = 3,458.43 × 1,387.06
4. Step 4: Simplify right side
   2,506.30x = 4,797,049.92
5. Step 5: Solve for x
   x = 4,797,049.92/2,506.30
6. Step 6: Final answer
   x = 1,914.00