Finding the Fourth Proportional to 3,112.16, 4,667.12 and 1,031.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.16 : 4,667.12 = 1,031.80 : x
2. Step 2: Convert to fraction form
   3,112.16/4,667.12 = 1,031.80/x
3. Step 3: Cross multiply
   3,112.16x = 4,667.12 × 1,031.80
4. Step 4: Simplify right side
   3,112.16x = 4,815,534.42
5. Step 5: Solve for x
   x = 4,815,534.42/3,112.16
6. Step 6: Final answer
   x = 1,547.33