Finding the Fourth Proportional to 2,506.72, 3,459.15 and 1,387.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.72 : 3,459.15 = 1,387.63 : x
2. Step 2: Convert to fraction form
   2,506.72/3,459.15 = 1,387.63/x
3. Step 3: Cross multiply
   2,506.72x = 3,459.15 × 1,387.63
4. Step 4: Simplify right side
   2,506.72x = 4,800,020.31
5. Step 5: Solve for x
   x = 4,800,020.31/2,506.72
6. Step 6: Final answer
   x = 1,914.86