Finding the Fourth Proportional to 1,418.65, 2,123.42 and 758.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.65 : 2,123.42 = 758.88 : x
2. Step 2: Convert to fraction form
   1,418.65/2,123.42 = 758.88/x
3. Step 3: Cross multiply
   1,418.65x = 2,123.42 × 758.88
4. Step 4: Simplify right side
   1,418.65x = 1,611,414.90
5. Step 5: Solve for x
   x = 1,611,414.90/1,418.65
6. Step 6: Final answer
   x = 1,135.88