Finding the Fourth Proportional to 1,308.81, 1,964.34 and 760.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.81 : 1,964.34 = 760.23 : x
2. Step 2: Convert to fraction form
   1,308.81/1,964.34 = 760.23/x
3. Step 3: Cross multiply
   1,308.81x = 1,964.34 × 760.23
4. Step 4: Simplify right side
   1,308.81x = 1,493,350.20
5. Step 5: Solve for x
   x = 1,493,350.20/1,308.81
6. Step 6: Final answer
   x = 1,141.00