Finding the Fourth Proportional to 1,366.56, 1,885.68 and 768.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.56 : 1,885.68 = 768.98 : x
2. Step 2: Convert to fraction form
   1,366.56/1,885.68 = 768.98/x
3. Step 3: Cross multiply
   1,366.56x = 1,885.68 × 768.98
4. Step 4: Simplify right side
   1,366.56x = 1,450,044.31
5. Step 5: Solve for x
   x = 1,450,044.31/1,366.56
6. Step 6: Final answer
   x = 1,061.09