Finding the Fourth Proportional to 2,860.31, 3,946.72 and 1,681.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.31 : 3,946.72 = 1,681.62 : x
2. Step 2: Convert to fraction form
   2,860.31/3,946.72 = 1,681.62/x
3. Step 3: Cross multiply
   2,860.31x = 3,946.72 × 1,681.62
4. Step 4: Simplify right side
   2,860.31x = 6,636,883.29
5. Step 5: Solve for x
   x = 6,636,883.29/2,860.31
6. Step 6: Final answer
   x = 2,320.34