Finding the Fourth Proportional to 2,074.40, 3,111.89 and 757.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.40 : 3,111.89 = 757.98 : x
2. Step 2: Convert to fraction form
   2,074.40/3,111.89 = 757.98/x
3. Step 3: Cross multiply
   2,074.40x = 3,111.89 × 757.98
4. Step 4: Simplify right side
   2,074.40x = 2,358,750.38
5. Step 5: Solve for x
   x = 2,358,750.38/2,074.40
6. Step 6: Final answer
   x = 1,137.08