Finding the Fourth Proportional to 2,603.43, 3,905.69 and 1,994.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.43 : 3,905.69 = 1,994.85 : x
2. Step 2: Convert to fraction form
   2,603.43/3,905.69 = 1,994.85/x
3. Step 3: Cross multiply
   2,603.43x = 3,905.69 × 1,994.85
4. Step 4: Simplify right side
   2,603.43x = 7,791,255.72
5. Step 5: Solve for x
   x = 7,791,255.72/2,603.43
6. Step 6: Final answer
   x = 2,992.69