Finding the Fourth Proportional to 1,681.98, 2,320.86 and 935.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.98 : 2,320.86 = 935.93 : x
2. Step 2: Convert to fraction form
   1,681.98/2,320.86 = 935.93/x
3. Step 3: Cross multiply
   1,681.98x = 2,320.86 × 935.93
4. Step 4: Simplify right side
   1,681.98x = 2,172,150.90
5. Step 5: Solve for x
   x = 2,172,150.90/1,681.98
6. Step 6: Final answer
   x = 1,291.42