Finding the Fourth Proportional to 3,443.61, 5,161.76 and 2,619.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.61 : 5,161.76 = 2,619.84 : x
2. Step 2: Convert to fraction form
   3,443.61/5,161.76 = 2,619.84/x
3. Step 3: Cross multiply
   3,443.61x = 5,161.76 × 2,619.84
4. Step 4: Simplify right side
   3,443.61x = 13,522,985.32
5. Step 5: Solve for x
   x = 13,522,985.32/3,443.61
6. Step 6: Final answer
   x = 3,926.98