Finding the Fourth Proportional to 1,269.72, 1,904.22 and 576

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269.72 : 1,904.22 = 576 : x
2. Step 2: Convert to fraction form
   1,269.72/1,904.22 = 576/x
3. Step 3: Cross multiply
   1,269.72x = 1,904.22 × 576
4. Step 4: Simplify right side
   1,269.72x = 1,096,830.72
5. Step 5: Solve for x
   x = 1,096,830.72/1,269.72
6. Step 6: Final answer
   x = 863.84