Finding the Fourth Proportional to 1,851.69, 2,780.27 and 758.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.69 : 2,780.27 = 758.19 : x
2. Step 2: Convert to fraction form
   1,851.69/2,780.27 = 758.19/x
3. Step 3: Cross multiply
   1,851.69x = 2,780.27 × 758.19
4. Step 4: Simplify right side
   1,851.69x = 2,107,958.69
5. Step 5: Solve for x
   x = 2,107,958.69/1,851.69
6. Step 6: Final answer
   x = 1,138.40