Finding the Fourth Proportional to 2,619.89, 3,924.70 and 1,521.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.89 : 3,924.70 = 1,521.96 : x
2. Step 2: Convert to fraction form
   2,619.89/3,924.70 = 1,521.96/x
3. Step 3: Cross multiply
   2,619.89x = 3,924.70 × 1,521.96
4. Step 4: Simplify right side
   2,619.89x = 5,973,236.41
5. Step 5: Solve for x
   x = 5,973,236.41/2,619.89
6. Step 6: Final answer
   x = 2,279.96