Finding the Fourth Proportional to 1,394.56, 1,922.88 and 1,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.56 : 1,922.88 = 1,131.76 : x
2. Step 2: Convert to fraction form
   1,394.56/1,922.88 = 1,131.76/x
3. Step 3: Cross multiply
   1,394.56x = 1,922.88 × 1,131.76
4. Step 4: Simplify right side
   1,394.56x = 2,176,238.67
5. Step 5: Solve for x
   x = 2,176,238.67/1,394.56
6. Step 6: Final answer
   x = 1,560.52