Finding the Fourth Proportional to 1,358.34, 1,874.46 and 768.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.34 : 1,874.46 = 768.87 : x
2. Step 2: Convert to fraction form
   1,358.34/1,874.46 = 768.87/x
3. Step 3: Cross multiply
   1,358.34x = 1,874.46 × 768.87
4. Step 4: Simplify right side
   1,358.34x = 1,441,216.06
5. Step 5: Solve for x
   x = 1,441,216.06/1,358.34
6. Step 6: Final answer
   x = 1,061.01