Finding the Fourth Proportional to 1,499.81, 2,253.78 and 769.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.81 : 2,253.78 = 769.89 : x
2. Step 2: Convert to fraction form
   1,499.81/2,253.78 = 769.89/x
3. Step 3: Cross multiply
   1,499.81x = 2,253.78 × 769.89
4. Step 4: Simplify right side
   1,499.81x = 1,735,162.68
5. Step 5: Solve for x
   x = 1,735,162.68/1,499.81
6. Step 6: Final answer
   x = 1,156.93