Finding the Fourth Proportional to 1,358.61, 1,874.57 and 769.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.61 : 1,874.57 = 769.07 : x
2. Step 2: Convert to fraction form
   1,358.61/1,874.57 = 769.07/x
3. Step 3: Cross multiply
   1,358.61x = 1,874.57 × 769.07
4. Step 4: Simplify right side
   1,358.61x = 1,441,662.33
5. Step 5: Solve for x
   x = 1,441,662.33/1,358.61
6. Step 6: Final answer
   x = 1,061.13