Finding the Fourth Proportional to 1,358.16, 1,873.98 and 768.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.16 : 1,873.98 = 768.84 : x
2. Step 2: Convert to fraction form
   1,358.16/1,873.98 = 768.84/x
3. Step 3: Cross multiply
   1,358.16x = 1,873.98 × 768.84
4. Step 4: Simplify right side
   1,358.16x = 1,440,790.78
5. Step 5: Solve for x
   x = 1,440,790.78/1,358.16
6. Step 6: Final answer
   x = 1,060.84