Finding the Fourth Proportional to 1,145.43, 1,580.66 and 648.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.43 : 1,580.66 = 648.22 : x
2. Step 2: Convert to fraction form
   1,145.43/1,580.66 = 648.22/x
3. Step 3: Cross multiply
   1,145.43x = 1,580.66 × 648.22
4. Step 4: Simplify right side
   1,145.43x = 1,024,615.43
5. Step 5: Solve for x
   x = 1,024,615.43/1,145.43
6. Step 6: Final answer
   x = 894.53