Finding the Fourth Proportional to 1,308.34, 1,961.77 and 528.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.34 : 1,961.77 = 528.71 : x
2. Step 2: Convert to fraction form
   1,308.34/1,961.77 = 528.71/x
3. Step 3: Cross multiply
   1,308.34x = 1,961.77 × 528.71
4. Step 4: Simplify right side
   1,308.34x = 1,037,208.31
5. Step 5: Solve for x
   x = 1,037,208.31/1,308.34
6. Step 6: Final answer
   x = 792.77