Finding the Fourth Proportional to 1,555.09, 2,146.17 and 925.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.09 : 2,146.17 = 925.72 : x
2. Step 2: Convert to fraction form
   1,555.09/2,146.17 = 925.72/x
3. Step 3: Cross multiply
   1,555.09x = 2,146.17 × 925.72
4. Step 4: Simplify right side
   1,555.09x = 1,986,752.49
5. Step 5: Solve for x
   x = 1,986,752.49/1,555.09
6. Step 6: Final answer
   x = 1,277.58