Finding the Fourth Proportional to 2,636.83, 3,953.71 and 993.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.83 : 3,953.71 = 993.51 : x
2. Step 2: Convert to fraction form
   2,636.83/3,953.71 = 993.51/x
3. Step 3: Cross multiply
   2,636.83x = 3,953.71 × 993.51
4. Step 4: Simplify right side
   2,636.83x = 3,928,051.66
5. Step 5: Solve for x
   x = 3,928,051.66/2,636.83
6. Step 6: Final answer
   x = 1,489.69