Finding the Fourth Proportional to 2,551.72, 3,824.36 and 1,381.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.72 : 3,824.36 = 1,381.68 : x
2. Step 2: Convert to fraction form
   2,551.72/3,824.36 = 1,381.68/x
3. Step 3: Cross multiply
   2,551.72x = 3,824.36 × 1,381.68
4. Step 4: Simplify right side
   2,551.72x = 5,284,041.72
5. Step 5: Solve for x
   x = 5,284,041.72/2,551.72
6. Step 6: Final answer
   x = 2,070.78