Finding the Fourth Proportional to 2,141.58, 2,954.28 and 1,396.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.58 : 2,954.28 = 1,396.78 : x
2. Step 2: Convert to fraction form
   2,141.58/2,954.28 = 1,396.78/x
3. Step 3: Cross multiply
   2,141.58x = 2,954.28 × 1,396.78
4. Step 4: Simplify right side
   2,141.58x = 4,126,479.22
5. Step 5: Solve for x
   x = 4,126,479.22/2,141.58
6. Step 6: Final answer
   x = 1,926.84