Finding the Fourth Proportional to 1,308.42, 1,961.46 and 528.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.42 : 1,961.46 = 528.30 : x
2. Step 2: Convert to fraction form
   1,308.42/1,961.46 = 528.30/x
3. Step 3: Cross multiply
   1,308.42x = 1,961.46 × 528.30
4. Step 4: Simplify right side
   1,308.42x = 1,036,239.32
5. Step 5: Solve for x
   x = 1,036,239.32/1,308.42
6. Step 6: Final answer
   x = 791.98