Finding the Fourth Proportional to 4,171.98, 6,253.62 and 1,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,171.98 : 6,253.62 = 1,978.10 : x
2. Step 2: Convert to fraction form
   4,171.98/6,253.62 = 1,978.10/x
3. Step 3: Cross multiply
   4,171.98x = 6,253.62 × 1,978.10
4. Step 4: Simplify right side
   4,171.98x = 12,370,285.72
5. Step 5: Solve for x
   x = 12,370,285.72/4,171.98
6. Step 6: Final answer
   x = 2,965.09