Finding the Fourth Proportional to 2,990.71, 4,477.56 and 1,951.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,990.71 : 4,477.56 = 1,951.89 : x
2. Step 2: Convert to fraction form
   2,990.71/4,477.56 = 1,951.89/x
3. Step 3: Cross multiply
   2,990.71x = 4,477.56 × 1,951.89
4. Step 4: Simplify right side
   2,990.71x = 8,739,704.59
5. Step 5: Solve for x
   x = 8,739,704.59/2,990.71
6. Step 6: Final answer
   x = 2,922.28