Finding the Fourth Proportional to 1,528.97, 2,109.98 and 830.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.97 : 2,109.98 = 830.35 : x
2. Step 2: Convert to fraction form
   1,528.97/2,109.98 = 830.35/x
3. Step 3: Cross multiply
   1,528.97x = 2,109.98 × 830.35
4. Step 4: Simplify right side
   1,528.97x = 1,752,021.89
5. Step 5: Solve for x
   x = 1,752,021.89/1,528.97
6. Step 6: Final answer
   x = 1,145.88