Finding the Fourth Proportional to 2,506.56, 3,458.77 and 1,387.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.56 : 3,458.77 = 1,387.35 : x
2. Step 2: Convert to fraction form
   2,506.56/3,458.77 = 1,387.35/x
3. Step 3: Cross multiply
   2,506.56x = 3,458.77 × 1,387.35
4. Step 4: Simplify right side
   2,506.56x = 4,798,524.56
5. Step 5: Solve for x
   x = 4,798,524.56/2,506.56
6. Step 6: Final answer
   x = 1,914.39