Finding the Fourth Proportional to 1,544.37, 2,131.56 and 906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.37 : 2,131.56 = 906.72 : x
2. Step 2: Convert to fraction form
   1,544.37/2,131.56 = 906.72/x
3. Step 3: Cross multiply
   1,544.37x = 2,131.56 × 906.72
4. Step 4: Simplify right side
   1,544.37x = 1,932,728.08
5. Step 5: Solve for x
   x = 1,932,728.08/1,544.37
6. Step 6: Final answer
   x = 1,251.47