Finding the Fourth Proportional to 2,978.01, 4,106.82 and 1,981.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.01 : 4,106.82 = 1,981.56 : x
2. Step 2: Convert to fraction form
   2,978.01/4,106.82 = 1,981.56/x
3. Step 3: Cross multiply
   2,978.01x = 4,106.82 × 1,981.56
4. Step 4: Simplify right side
   2,978.01x = 8,137,910.24
5. Step 5: Solve for x
   x = 8,137,910.24/2,978.01
6. Step 6: Final answer
   x = 2,732.67