Finding the Fourth Proportional to 1,681.96, 2,320.86 and 935.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.96 : 2,320.86 = 935.94 : x
2. Step 2: Convert to fraction form
   1,681.96/2,320.86 = 935.94/x
3. Step 3: Cross multiply
   1,681.96x = 2,320.86 × 935.94
4. Step 4: Simplify right side
   1,681.96x = 2,172,185.71
5. Step 5: Solve for x
   x = 2,172,185.71/1,681.96
6. Step 6: Final answer
   x = 1,291.46