Finding the Fourth Proportional to 2,921.02, 4,379.85 and 1,072.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,921.02 : 4,379.85 = 1,072.71 : x
2. Step 2: Convert to fraction form
   2,921.02/4,379.85 = 1,072.71/x
3. Step 3: Cross multiply
   2,921.02x = 4,379.85 × 1,072.71
4. Step 4: Simplify right side
   2,921.02x = 4,698,308.89
5. Step 5: Solve for x
   x = 4,698,308.89/2,921.02
6. Step 6: Final answer
   x = 1,608.45