Finding the Fourth Proportional to 2,978.89, 4,110.18 and 1,984.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.89 : 4,110.18 = 1,984.70 : x
2. Step 2: Convert to fraction form
   2,978.89/4,110.18 = 1,984.70/x
3. Step 3: Cross multiply
   2,978.89x = 4,110.18 × 1,984.70
4. Step 4: Simplify right side
   2,978.89x = 8,157,474.25
5. Step 5: Solve for x
   x = 8,157,474.25/2,978.89
6. Step 6: Final answer
   x = 2,738.43