Finding the Fourth Proportional to 1,012.72, 1,401.24 and 882.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.72 : 1,401.24 = 882.16 : x
2. Step 2: Convert to fraction form
   1,012.72/1,401.24 = 882.16/x
3. Step 3: Cross multiply
   1,012.72x = 1,401.24 × 882.16
4. Step 4: Simplify right side
   1,012.72x = 1,236,117.88
5. Step 5: Solve for x
   x = 1,236,117.88/1,012.72
6. Step 6: Final answer
   x = 1,220.59