Finding the Fourth Proportional to 1,134.72, 1,566.40 and 886.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.72 : 1,566.40 = 886.72 : x
2. Step 2: Convert to fraction form
   1,134.72/1,566.40 = 886.72/x
3. Step 3: Cross multiply
   1,134.72x = 1,566.40 × 886.72
4. Step 4: Simplify right side
   1,134.72x = 1,388,958.21
5. Step 5: Solve for x
   x = 1,388,958.21/1,134.72
6. Step 6: Final answer
   x = 1,224.05