Finding the Fourth Proportional to 3,112.42, 4,666.98 and 920.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.42 : 4,666.98 = 920.83 : x
2. Step 2: Convert to fraction form
   3,112.42/4,666.98 = 920.83/x
3. Step 3: Cross multiply
   3,112.42x = 4,666.98 × 920.83
4. Step 4: Simplify right side
   3,112.42x = 4,297,495.19
5. Step 5: Solve for x
   x = 4,297,495.19/3,112.42
6. Step 6: Final answer
   x = 1,380.76