Finding the Fourth Proportional to 2,961.79, 4,087.91 and 2,019.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,961.79 : 4,087.91 = 2,019.83 : x
2. Step 2: Convert to fraction form
   2,961.79/4,087.91 = 2,019.83/x
3. Step 3: Cross multiply
   2,961.79x = 4,087.91 × 2,019.83
4. Step 4: Simplify right side
   2,961.79x = 8,256,852.72
5. Step 5: Solve for x
   x = 8,256,852.72/2,961.79
6. Step 6: Final answer
   x = 2,787.80