Finding the Fourth Proportional to 2,884.50, 3,978.99 and 1,889.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,884.50 : 3,978.99 = 1,889.55 : x
2. Step 2: Convert to fraction form
   2,884.50/3,978.99 = 1,889.55/x
3. Step 3: Cross multiply
   2,884.50x = 3,978.99 × 1,889.55
4. Step 4: Simplify right side
   2,884.50x = 7,518,500.55
5. Step 5: Solve for x
   x = 7,518,500.55/2,884.50
6. Step 6: Final answer
   x = 2,606.52