Finding the Fourth Proportional to 1,472.31, 2,031.27 and 912.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,472.31 : 2,031.27 = 912.20 : x
2. Step 2: Convert to fraction form
   1,472.31/2,031.27 = 912.20/x
3. Step 3: Cross multiply
   1,472.31x = 2,031.27 × 912.20
4. Step 4: Simplify right side
   1,472.31x = 1,852,914.34
5. Step 5: Solve for x
   x = 1,852,914.34/1,472.31
6. Step 6: Final answer
   x = 1,258.51