Finding the Fourth Proportional to 1,090.32, 1,504.72 and 648.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.32 : 1,504.72 = 648.24 : x
2. Step 2: Convert to fraction form
   1,090.32/1,504.72 = 648.24/x
3. Step 3: Cross multiply
   1,090.32x = 1,504.72 × 648.24
4. Step 4: Simplify right side
   1,090.32x = 975,419.69
5. Step 5: Solve for x
   x = 975,419.69/1,090.32
6. Step 6: Final answer
   x = 894.62