Finding the Fourth Proportional to 1,392.28, 2,078.53 and 1,173.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.28 : 2,078.53 = 1,173.56 : x
2. Step 2: Convert to fraction form
   1,392.28/2,078.53 = 1,173.56/x
3. Step 3: Cross multiply
   1,392.28x = 2,078.53 × 1,173.56
4. Step 4: Simplify right side
   1,392.28x = 2,439,279.67
5. Step 5: Solve for x
   x = 2,439,279.67/1,392.28
6. Step 6: Final answer
   x = 1,752.00