Finding the Fourth Proportional to 1,145.82, 1,719.15 and 452.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.82 : 1,719.15 = 452.10 : x
2. Step 2: Convert to fraction form
   1,145.82/1,719.15 = 452.10/x
3. Step 3: Cross multiply
   1,145.82x = 1,719.15 × 452.10
4. Step 4: Simplify right side
   1,145.82x = 777,227.72
5. Step 5: Solve for x
   x = 777,227.72/1,145.82
6. Step 6: Final answer
   x = 678.32