Finding the Fourth Proportional to 2,920.01, 4,379.76 and 1,071.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.01 : 4,379.76 = 1,071.05 : x
2. Step 2: Convert to fraction form
   2,920.01/4,379.76 = 1,071.05/x
3. Step 3: Cross multiply
   2,920.01x = 4,379.76 × 1,071.05
4. Step 4: Simplify right side
   2,920.01x = 4,690,920.05
5. Step 5: Solve for x
   x = 4,690,920.05/2,920.01
6. Step 6: Final answer
   x = 1,606.48