Finding the Fourth Proportional to 2,920.16, 4,381.37 and 1,072.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.16 : 4,381.37 = 1,072.55 : x
2. Step 2: Convert to fraction form
   2,920.16/4,381.37 = 1,072.55/x
3. Step 3: Cross multiply
   2,920.16x = 4,381.37 × 1,072.55
4. Step 4: Simplify right side
   2,920.16x = 4,699,238.39
5. Step 5: Solve for x
   x = 4,699,238.39/2,920.16
6. Step 6: Final answer
   x = 1,609.24