Finding the Fourth Proportional to 1,146.69, 1,719.43 and 453.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.69 : 1,719.43 = 453.33 : x
2. Step 2: Convert to fraction form
   1,146.69/1,719.43 = 453.33/x
3. Step 3: Cross multiply
   1,146.69x = 1,719.43 × 453.33
4. Step 4: Simplify right side
   1,146.69x = 779,468.07
5. Step 5: Solve for x
   x = 779,468.07/1,146.69
6. Step 6: Final answer
   x = 679.75