Finding the Fourth Proportional to 1,931.32, 2,665.21 and 1,047.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.32 : 2,665.21 = 1,047.12 : x
2. Step 2: Convert to fraction form
   1,931.32/2,665.21 = 1,047.12/x
3. Step 3: Cross multiply
   1,931.32x = 2,665.21 × 1,047.12
4. Step 4: Simplify right side
   1,931.32x = 2,790,794.70
5. Step 5: Solve for x
   x = 2,790,794.70/1,931.32
6. Step 6: Final answer
   x = 1,445.02