Finding the Fourth Proportional to 2,930.90, 4,375.40 and 2,828.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,930.90 : 4,375.40 = 2,828.34 : x
2. Step 2: Convert to fraction form
   2,930.90/4,375.40 = 2,828.34/x
3. Step 3: Cross multiply
   2,930.90x = 4,375.40 × 2,828.34
4. Step 4: Simplify right side
   2,930.90x = 12,375,104.69
5. Step 5: Solve for x
   x = 12,375,104.69/2,930.90
6. Step 6: Final answer
   x = 4,222.30