Finding the Fourth Proportional to 1,853.89, 2,780.69 and 757.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.89 : 2,780.69 = 757.96 : x
2. Step 2: Convert to fraction form
   1,853.89/2,780.69 = 757.96/x
3. Step 3: Cross multiply
   1,853.89x = 2,780.69 × 757.96
4. Step 4: Simplify right side
   1,853.89x = 2,107,651.79
5. Step 5: Solve for x
   x = 2,107,651.79/1,853.89
6. Step 6: Final answer
   x = 1,136.88