Finding the Fourth Proportional to 1,472.56, 2,031.61 and 912.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,472.56 : 2,031.61 = 912.45 : x
2. Step 2: Convert to fraction form
   1,472.56/2,031.61 = 912.45/x
3. Step 3: Cross multiply
   1,472.56x = 2,031.61 × 912.45
4. Step 4: Simplify right side
   1,472.56x = 1,853,742.54
5. Step 5: Solve for x
   x = 1,853,742.54/1,472.56
6. Step 6: Final answer
   x = 1,258.86