Finding the Fourth Proportional to 1,105.48, 1,656.36 and 671.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.48 : 1,656.36 = 671.32 : x
2. Step 2: Convert to fraction form
   1,105.48/1,656.36 = 671.32/x
3. Step 3: Cross multiply
   1,105.48x = 1,656.36 × 671.32
4. Step 4: Simplify right side
   1,105.48x = 1,111,947.60
5. Step 5: Solve for x
   x = 1,111,947.60/1,105.48
6. Step 6: Final answer
   x = 1,005.85