Finding the Fourth Proportional to 1,691.91, 2,336.31 and 1,636.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691.91 : 2,336.31 = 1,636.83 : x
2. Step 2: Convert to fraction form
   1,691.91/2,336.31 = 1,636.83/x
3. Step 3: Cross multiply
   1,691.91x = 2,336.31 × 1,636.83
4. Step 4: Simplify right side
   1,691.91x = 3,824,142.30
5. Step 5: Solve for x
   x = 3,824,142.30/1,691.91
6. Step 6: Final answer
   x = 2,260.25