Finding the Fourth Proportional to 1,423.78, 2,134.59 and 773.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.78 : 2,134.59 = 773.62 : x
2. Step 2: Convert to fraction form
   1,423.78/2,134.59 = 773.62/x
3. Step 3: Cross multiply
   1,423.78x = 2,134.59 × 773.62
4. Step 4: Simplify right side
   1,423.78x = 1,651,361.52
5. Step 5: Solve for x
   x = 1,651,361.52/1,423.78
6. Step 6: Final answer
   x = 1,159.84