Finding the Fourth Proportional to 1,358.56, 1,874.52 and 768.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.56 : 1,874.52 = 768.98 : x
2. Step 2: Convert to fraction form
   1,358.56/1,874.52 = 768.98/x
3. Step 3: Cross multiply
   1,358.56x = 1,874.52 × 768.98
4. Step 4: Simplify right side
   1,358.56x = 1,441,468.39
5. Step 5: Solve for x
   x = 1,441,468.39/1,358.56
6. Step 6: Final answer
   x = 1,061.03