Finding the Fourth Proportional to 1,513.91, 2,271.83 and 648.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.91 : 2,271.83 = 648.22 : x
2. Step 2: Convert to fraction form
   1,513.91/2,271.83 = 648.22/x
3. Step 3: Cross multiply
   1,513.91x = 2,271.83 × 648.22
4. Step 4: Simplify right side
   1,513.91x = 1,472,645.64
5. Step 5: Solve for x
   x = 1,472,645.64/1,513.91
6. Step 6: Final answer
   x = 972.74