Finding the Fourth Proportional to 2,619.72, 3,924.84 and 1,885.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.72 : 3,924.84 = 1,885.80 : x
2. Step 2: Convert to fraction form
   2,619.72/3,924.84 = 1,885.80/x
3. Step 3: Cross multiply
   2,619.72x = 3,924.84 × 1,885.80
4. Step 4: Simplify right side
   2,619.72x = 7,401,463.27
5. Step 5: Solve for x
   x = 7,401,463.27/2,619.72
6. Step 6: Final answer
   x = 2,825.29