Finding the Fourth Proportional to 1,179.50, 1,627.61 and 648.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.50 : 1,627.61 = 648.36 : x
2. Step 2: Convert to fraction form
   1,179.50/1,627.61 = 648.36/x
3. Step 3: Cross multiply
   1,179.50x = 1,627.61 × 648.36
4. Step 4: Simplify right side
   1,179.50x = 1,055,273.98
5. Step 5: Solve for x
   x = 1,055,273.98/1,179.50
6. Step 6: Final answer
   x = 894.68