Finding the Fourth Proportional to 1,168.72, 1,753.32 and 438.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.72 : 1,753.32 = 438.22 : x
2. Step 2: Convert to fraction form
   1,168.72/1,753.32 = 438.22/x
3. Step 3: Cross multiply
   1,168.72x = 1,753.32 × 438.22
4. Step 4: Simplify right side
   1,168.72x = 768,339.89
5. Step 5: Solve for x
   x = 768,339.89/1,168.72
6. Step 6: Final answer
   x = 657.42