Finding the Fourth Proportional to 1,308.69, 1,962.73 and 487.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.69 : 1,962.73 = 487.35 : x
2. Step 2: Convert to fraction form
   1,308.69/1,962.73 = 487.35/x
3. Step 3: Cross multiply
   1,308.69x = 1,962.73 × 487.35
4. Step 4: Simplify right side
   1,308.69x = 956,536.47
5. Step 5: Solve for x
   x = 956,536.47/1,308.69
6. Step 6: Final answer
   x = 730.91