Finding the Fourth Proportional to 2,780.84, 4,168.35 and 930.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.84 : 4,168.35 = 930.43 : x
2. Step 2: Convert to fraction form
   2,780.84/4,168.35 = 930.43/x
3. Step 3: Cross multiply
   2,780.84x = 4,168.35 × 930.43
4. Step 4: Simplify right side
   2,780.84x = 3,878,370.64
5. Step 5: Solve for x
   x = 3,878,370.64/2,780.84
6. Step 6: Final answer
   x = 1,394.68