Finding the Fourth Proportional to 850.72, 1,173.72 and 501.34

Step by Step Solution

1. Step 1: Write the proportion equation
   850.72 : 1,173.72 = 501.34 : x
2. Step 2: Convert to fraction form
   850.72/1,173.72 = 501.34/x
3. Step 3: Cross multiply
   850.72x = 1,173.72 × 501.34
4. Step 4: Simplify right side
   850.72x = 588,432.78
5. Step 5: Solve for x
   x = 588,432.78/850.72
6. Step 6: Final answer
   x = 691.69