Finding the Fourth Proportional to 1,358.21, 1,874.37 and 768.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.21 : 1,874.37 = 768.83 : x
2. Step 2: Convert to fraction form
   1,358.21/1,874.37 = 768.83/x
3. Step 3: Cross multiply
   1,358.21x = 1,874.37 × 768.83
4. Step 4: Simplify right side
   1,358.21x = 1,441,071.89
5. Step 5: Solve for x
   x = 1,441,071.89/1,358.21
6. Step 6: Final answer
   x = 1,061.01