Finding the Fourth Proportional to 2,056.76, 2,836.64 and 1,392.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.76 : 2,836.64 = 1,392.56 : x
2. Step 2: Convert to fraction form
   2,056.76/2,836.64 = 1,392.56/x
3. Step 3: Cross multiply
   2,056.76x = 2,836.64 × 1,392.56
4. Step 4: Simplify right side
   2,056.76x = 3,950,191.40
5. Step 5: Solve for x
   x = 3,950,191.40/2,056.76
6. Step 6: Final answer
   x = 1,920.59