Finding the Fourth Proportional to 2,007.63, 3,009.83 and 836.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.63 : 3,009.83 = 836.91 : x
2. Step 2: Convert to fraction form
   2,007.63/3,009.83 = 836.91/x
3. Step 3: Cross multiply
   2,007.63x = 3,009.83 × 836.91
4. Step 4: Simplify right side
   2,007.63x = 2,518,952.64
5. Step 5: Solve for x
   x = 2,518,952.64/2,007.63
6. Step 6: Final answer
   x = 1,254.69