Finding the Fourth Proportional to 2,978.93, 4,104.29 and 2,180.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.93 : 4,104.29 = 2,180.90 : x
2. Step 2: Convert to fraction form
   2,978.93/4,104.29 = 2,180.90/x
3. Step 3: Cross multiply
   2,978.93x = 4,104.29 × 2,180.90
4. Step 4: Simplify right side
   2,978.93x = 8,951,061.77
5. Step 5: Solve for x
   x = 8,951,061.77/2,978.93
6. Step 6: Final answer
   x = 3,004.79