Finding the Fourth Proportional to 1,068.24, 1,472.20 and 871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.24 : 1,472.20 = 871.12 : x
2. Step 2: Convert to fraction form
   1,068.24/1,472.20 = 871.12/x
3. Step 3: Cross multiply
   1,068.24x = 1,472.20 × 871.12
4. Step 4: Simplify right side
   1,068.24x = 1,282,462.86
5. Step 5: Solve for x
   x = 1,282,462.86/1,068.24
6. Step 6: Final answer
   x = 1,200.54