Finding the Fourth Proportional to 1,418.67, 2,128.46 and 769.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.67 : 2,128.46 = 769.05 : x
2. Step 2: Convert to fraction form
   1,418.67/2,128.46 = 769.05/x
3. Step 3: Cross multiply
   1,418.67x = 2,128.46 × 769.05
4. Step 4: Simplify right side
   1,418.67x = 1,636,888.32
5. Step 5: Solve for x
   x = 1,636,888.32/1,418.67
6. Step 6: Final answer
   x = 1,153.82