Finding the Fourth Proportional to 2,387.36, 3,292.59 and 1,681.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.36 : 3,292.59 = 1,681.55 : x
2. Step 2: Convert to fraction form
   2,387.36/3,292.59 = 1,681.55/x
3. Step 3: Cross multiply
   2,387.36x = 3,292.59 × 1,681.55
4. Step 4: Simplify right side
   2,387.36x = 5,536,638.25
5. Step 5: Solve for x
   x = 5,536,638.25/2,387.36
6. Step 6: Final answer
   x = 2,319.15