Finding the Fourth Proportional to 2,758.05, 4,137.31 and 783.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.05 : 4,137.31 = 783.69 : x
2. Step 2: Convert to fraction form
   2,758.05/4,137.31 = 783.69/x
3. Step 3: Cross multiply
   2,758.05x = 4,137.31 × 783.69
4. Step 4: Simplify right side
   2,758.05x = 3,242,353.94
5. Step 5: Solve for x
   x = 3,242,353.94/2,758.05
6. Step 6: Final answer
   x = 1,175.60