Finding the Fourth Proportional to 1,555.32, 2,146.18 and 925.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.32 : 2,146.18 = 925.78 : x
2. Step 2: Convert to fraction form
   1,555.32/2,146.18 = 925.78/x
3. Step 3: Cross multiply
   1,555.32x = 2,146.18 × 925.78
4. Step 4: Simplify right side
   1,555.32x = 1,986,890.52
5. Step 5: Solve for x
   x = 1,986,890.52/1,555.32
6. Step 6: Final answer
   x = 1,277.48