Finding the Fourth Proportional to 1,431.56, 1,974.83 and 892.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.56 : 1,974.83 = 892.76 : x
2. Step 2: Convert to fraction form
   1,431.56/1,974.83 = 892.76/x
3. Step 3: Cross multiply
   1,431.56x = 1,974.83 × 892.76
4. Step 4: Simplify right side
   1,431.56x = 1,763,044.29
5. Step 5: Solve for x
   x = 1,763,044.29/1,431.56
6. Step 6: Final answer
   x = 1,231.55