Finding the Fourth Proportional to 2,635.31, 3,636.72 and 1,690.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.31 : 3,636.72 = 1,690.81 : x
2. Step 2: Convert to fraction form
   2,635.31/3,636.72 = 1,690.81/x
3. Step 3: Cross multiply
   2,635.31x = 3,636.72 × 1,690.81
4. Step 4: Simplify right side
   2,635.31x = 6,148,993.45
5. Step 5: Solve for x
   x = 6,148,993.45/2,635.31
6. Step 6: Final answer
   x = 2,333.31