Finding the Fourth Proportional to 3,821.61, 5,731.71 and 1,322.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,821.61 : 5,731.71 = 1,322.79 : x
2. Step 2: Convert to fraction form
   3,821.61/5,731.71 = 1,322.79/x
3. Step 3: Cross multiply
   3,821.61x = 5,731.71 × 1,322.79
4. Step 4: Simplify right side
   3,821.61x = 7,581,848.67
5. Step 5: Solve for x
   x = 7,581,848.67/3,821.61
6. Step 6: Final answer
   x = 1,983.94