Finding the Fourth Proportional to 1,358.09, 1,874.16 and 768.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.09 : 1,874.16 = 768.62 : x
2. Step 2: Convert to fraction form
   1,358.09/1,874.16 = 768.62/x
3. Step 3: Cross multiply
   1,358.09x = 1,874.16 × 768.62
4. Step 4: Simplify right side
   1,358.09x = 1,440,516.86
5. Step 5: Solve for x
   x = 1,440,516.86/1,358.09
6. Step 6: Final answer
   x = 1,060.69