Finding the Fourth Proportional to 2,978.53, 4,108.05 and 2,081.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.53 : 4,108.05 = 2,081.98 : x
2. Step 2: Convert to fraction form
   2,978.53/4,108.05 = 2,081.98/x
3. Step 3: Cross multiply
   2,978.53x = 4,108.05 × 2,081.98
4. Step 4: Simplify right side
   2,978.53x = 8,552,883.14
5. Step 5: Solve for x
   x = 8,552,883.14/2,978.53
6. Step 6: Final answer
   x = 2,871.51