Finding the Fourth Proportional to 1,358.42, 1,874.53 and 768.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.42 : 1,874.53 = 768.99 : x
2. Step 2: Convert to fraction form
   1,358.42/1,874.53 = 768.99/x
3. Step 3: Cross multiply
   1,358.42x = 1,874.53 × 768.99
4. Step 4: Simplify right side
   1,358.42x = 1,441,490.98
5. Step 5: Solve for x
   x = 1,441,490.98/1,358.42
6. Step 6: Final answer
   x = 1,061.16