Finding the Fourth Proportional to 2,606.69, 3,904.97 and 1,985.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.69 : 3,904.97 = 1,985.82 : x
2. Step 2: Convert to fraction form
   2,606.69/3,904.97 = 1,985.82/x
3. Step 3: Cross multiply
   2,606.69x = 3,904.97 × 1,985.82
4. Step 4: Simplify right side
   2,606.69x = 7,754,557.60
5. Step 5: Solve for x
   x = 7,754,557.60/2,606.69
6. Step 6: Final answer
   x = 2,974.87