Finding the Fourth Proportional to 1,358.47, 1,874.76 and 769.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.47 : 1,874.76 = 769.09 : x
2. Step 2: Convert to fraction form
   1,358.47/1,874.76 = 769.09/x
3. Step 3: Cross multiply
   1,358.47x = 1,874.76 × 769.09
4. Step 4: Simplify right side
   1,358.47x = 1,441,859.17
5. Step 5: Solve for x
   x = 1,441,859.17/1,358.47
6. Step 6: Final answer
   x = 1,061.38