Finding the Fourth Proportional to 1,172.02, 1,617.27 and 648.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.02 : 1,617.27 = 648.01 : x
2. Step 2: Convert to fraction form
   1,172.02/1,617.27 = 648.01/x
3. Step 3: Cross multiply
   1,172.02x = 1,617.27 × 648.01
4. Step 4: Simplify right side
   1,172.02x = 1,048,007.13
5. Step 5: Solve for x
   x = 1,048,007.13/1,172.02
6. Step 6: Final answer
   x = 894.19