Finding the Fourth Proportional to 1,179.21, 1,627.27 and 648.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.21 : 1,627.27 = 648.09 : x
2. Step 2: Convert to fraction form
   1,179.21/1,627.27 = 648.09/x
3. Step 3: Cross multiply
   1,179.21x = 1,627.27 × 648.09
4. Step 4: Simplify right side
   1,179.21x = 1,054,619.86
5. Step 5: Solve for x
   x = 1,054,619.86/1,179.21
6. Step 6: Final answer
   x = 894.35