Finding the Fourth Proportional to 1,091.12, 1,505.52 and 671.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.12 : 1,505.52 = 671.54 : x
2. Step 2: Convert to fraction form
   1,091.12/1,505.52 = 671.54/x
3. Step 3: Cross multiply
   1,091.12x = 1,505.52 × 671.54
4. Step 4: Simplify right side
   1,091.12x = 1,011,009.37
5. Step 5: Solve for x
   x = 1,011,009.37/1,091.12
6. Step 6: Final answer
   x = 926.58