Finding the Fourth Proportional to 1,412.38, 2,119.18 and 763.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.38 : 2,119.18 = 763.57 : x
2. Step 2: Convert to fraction form
   1,412.38/2,119.18 = 763.57/x
3. Step 3: Cross multiply
   1,412.38x = 2,119.18 × 763.57
4. Step 4: Simplify right side
   1,412.38x = 1,618,142.27
5. Step 5: Solve for x
   x = 1,618,142.27/1,412.38
6. Step 6: Final answer
   x = 1,145.68