Finding the Fourth Proportional to 1,075.69, 1,613.69 and 345.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.69 : 1,613.69 = 345.02 : x
2. Step 2: Convert to fraction form
   1,075.69/1,613.69 = 345.02/x
3. Step 3: Cross multiply
   1,075.69x = 1,613.69 × 345.02
4. Step 4: Simplify right side
   1,075.69x = 556,755.90
5. Step 5: Solve for x
   x = 556,755.90/1,075.69
6. Step 6: Final answer
   x = 517.58