Finding the Fourth Proportional to 1,171.72, 1,757.58 and 402.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.72 : 1,757.58 = 402.28 : x
2. Step 2: Convert to fraction form
   1,171.72/1,757.58 = 402.28/x
3. Step 3: Cross multiply
   1,171.72x = 1,757.58 × 402.28
4. Step 4: Simplify right side
   1,171.72x = 707,039.28
5. Step 5: Solve for x
   x = 707,039.28/1,171.72
6. Step 6: Final answer
   x = 603.42