Finding the Fourth Proportional to 1,681.83, 2,321.04 and 935.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.83 : 2,321.04 = 935.91 : x
2. Step 2: Convert to fraction form
   1,681.83/2,321.04 = 935.91/x
3. Step 3: Cross multiply
   1,681.83x = 2,321.04 × 935.91
4. Step 4: Simplify right side
   1,681.83x = 2,172,284.55
5. Step 5: Solve for x
   x = 2,172,284.55/1,681.83
6. Step 6: Final answer
   x = 1,291.62