Finding the Fourth Proportional to 3,112.02, 4,667.94 and 920.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.02 : 4,667.94 = 920.79 : x
2. Step 2: Convert to fraction form
   3,112.02/4,667.94 = 920.79/x
3. Step 3: Cross multiply
   3,112.02x = 4,667.94 × 920.79
4. Step 4: Simplify right side
   3,112.02x = 4,298,192.47
5. Step 5: Solve for x
   x = 4,298,192.47/3,112.02
6. Step 6: Final answer
   x = 1,381.16