Finding the Fourth Proportional to 1,308.34, 1,960.75 and 753.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.34 : 1,960.75 = 753.31 : x
2. Step 2: Convert to fraction form
   1,308.34/1,960.75 = 753.31/x
3. Step 3: Cross multiply
   1,308.34x = 1,960.75 × 753.31
4. Step 4: Simplify right side
   1,308.34x = 1,477,052.58
5. Step 5: Solve for x
   x = 1,477,052.58/1,308.34
6. Step 6: Final answer
   x = 1,128.95