Finding the Fourth Proportional to 1,179.30, 1,627.46 and 648.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.30 : 1,627.46 = 648.21 : x
2. Step 2: Convert to fraction form
   1,179.30/1,627.46 = 648.21/x
3. Step 3: Cross multiply
   1,179.30x = 1,627.46 × 648.21
4. Step 4: Simplify right side
   1,179.30x = 1,054,931.98
5. Step 5: Solve for x
   x = 1,054,931.98/1,179.30
6. Step 6: Final answer
   x = 894.54