Finding the Fourth Proportional to 1,171.99, 1,617.35 and 648.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.99 : 1,617.35 = 648.02 : x
2. Step 2: Convert to fraction form
   1,171.99/1,617.35 = 648.02/x
3. Step 3: Cross multiply
   1,171.99x = 1,617.35 × 648.02
4. Step 4: Simplify right side
   1,171.99x = 1,048,075.15
5. Step 5: Solve for x
   x = 1,048,075.15/1,171.99
6. Step 6: Final answer
   x = 894.27