Finding the Fourth Proportional to 2,768.69, 4,148.42 and 1,987.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.69 : 4,148.42 = 1,987.52 : x
2. Step 2: Convert to fraction form
   2,768.69/4,148.42 = 1,987.52/x
3. Step 3: Cross multiply
   2,768.69x = 4,148.42 × 1,987.52
4. Step 4: Simplify right side
   2,768.69x = 8,245,071.55
5. Step 5: Solve for x
   x = 8,245,071.55/2,768.69
6. Step 6: Final answer
   x = 2,977.97