Finding the Fourth Proportional to 3,882.78, 5,821.86 and 1,659.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,882.78 : 5,821.86 = 1,659.98 : x
2. Step 2: Convert to fraction form
   3,882.78/5,821.86 = 1,659.98/x
3. Step 3: Cross multiply
   3,882.78x = 5,821.86 × 1,659.98
4. Step 4: Simplify right side
   3,882.78x = 9,664,199.84
5. Step 5: Solve for x
   x = 9,664,199.84/3,882.78
6. Step 6: Final answer
   x = 2,488.99