Finding the Fourth Proportional to 1,075.81, 1,614.52 and 417.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.81 : 1,614.52 = 417.79 : x
2. Step 2: Convert to fraction form
   1,075.81/1,614.52 = 417.79/x
3. Step 3: Cross multiply
   1,075.81x = 1,614.52 × 417.79
4. Step 4: Simplify right side
   1,075.81x = 674,530.31
5. Step 5: Solve for x
   x = 674,530.31/1,075.81
6. Step 6: Final answer
   x = 627.00