Finding the Fourth Proportional to 1,544.32, 2,131.16 and 845.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.32 : 2,131.16 = 845.72 : x
2. Step 2: Convert to fraction form
   1,544.32/2,131.16 = 845.72/x
3. Step 3: Cross multiply
   1,544.32x = 2,131.16 × 845.72
4. Step 4: Simplify right side
   1,544.32x = 1,802,364.64
5. Step 5: Solve for x
   x = 1,802,364.64/1,544.32
6. Step 6: Final answer
   x = 1,167.09