Finding the Fourth Proportional to 2,849.59, 4,276.59 and 1,978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,849.59 : 4,276.59 = 1,978.21 : x
2. Step 2: Convert to fraction form
   2,849.59/4,276.59 = 1,978.21/x
3. Step 3: Cross multiply
   2,849.59x = 4,276.59 × 1,978.21
4. Step 4: Simplify right side
   2,849.59x = 8,459,993.10
5. Step 5: Solve for x
   x = 8,459,993.10/2,849.59
6. Step 6: Final answer
   x = 2,968.85