Finding the Fourth Proportional to 2,930.72, 4,395.94 and 1,081.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,930.72 : 4,395.94 = 1,081.70 : x
2. Step 2: Convert to fraction form
   2,930.72/4,395.94 = 1,081.70/x
3. Step 3: Cross multiply
   2,930.72x = 4,395.94 × 1,081.70
4. Step 4: Simplify right side
   2,930.72x = 4,755,088.30
5. Step 5: Solve for x
   x = 4,755,088.30/2,930.72
6. Step 6: Final answer
   x = 1,622.50