Finding the Fourth Proportional to 2,780.17, 3,830.04 and 1,939.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.17 : 3,830.04 = 1,939.34 : x
2. Step 2: Convert to fraction form
   2,780.17/3,830.04 = 1,939.34/x
3. Step 3: Cross multiply
   2,780.17x = 3,830.04 × 1,939.34
4. Step 4: Simplify right side
   2,780.17x = 7,427,759.35
5. Step 5: Solve for x
   x = 7,427,759.35/2,780.17
6. Step 6: Final answer
   x = 2,671.69