Finding the Fourth Proportional to 1,172.17, 1,757.69 and 350.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.17 : 1,757.69 = 350.15 : x
2. Step 2: Convert to fraction form
   1,172.17/1,757.69 = 350.15/x
3. Step 3: Cross multiply
   1,172.17x = 1,757.69 × 350.15
4. Step 4: Simplify right side
   1,172.17x = 615,455.15
5. Step 5: Solve for x
   x = 615,455.15/1,172.17
6. Step 6: Final answer
   x = 525.06