Finding the Fourth Proportional to 1,358.35, 1,874.12 and 760.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.35 : 1,874.12 = 760.78 : x
2. Step 2: Convert to fraction form
   1,358.35/1,874.12 = 760.78/x
3. Step 3: Cross multiply
   1,358.35x = 1,874.12 × 760.78
4. Step 4: Simplify right side
   1,358.35x = 1,425,791.55
5. Step 5: Solve for x
   x = 1,425,791.55/1,358.35
6. Step 6: Final answer
   x = 1,049.65