Finding the Fourth Proportional to 1,036.45, 1,554.69 and 830.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.45 : 1,554.69 = 830.05 : x
2. Step 2: Convert to fraction form
   1,036.45/1,554.69 = 830.05/x
3. Step 3: Cross multiply
   1,036.45x = 1,554.69 × 830.05
4. Step 4: Simplify right side
   1,036.45x = 1,290,470.43
5. Step 5: Solve for x
   x = 1,290,470.43/1,036.45
6. Step 6: Final answer
   x = 1,245.09