Finding the Fourth Proportional to 1,160.29, 1,739.34 and 646.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.29 : 1,739.34 = 646.21 : x
2. Step 2: Convert to fraction form
   1,160.29/1,739.34 = 646.21/x
3. Step 3: Cross multiply
   1,160.29x = 1,739.34 × 646.21
4. Step 4: Simplify right side
   1,160.29x = 1,123,978.90
5. Step 5: Solve for x
   x = 1,123,978.90/1,160.29
6. Step 6: Final answer
   x = 968.71