Finding the Fourth Proportional to 1,860.89, 2,785.86 and 1,243.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.89 : 2,785.86 = 1,243.07 : x
2. Step 2: Convert to fraction form
   1,860.89/2,785.86 = 1,243.07/x
3. Step 3: Cross multiply
   1,860.89x = 2,785.86 × 1,243.07
4. Step 4: Simplify right side
   1,860.89x = 3,463,005.06
5. Step 5: Solve for x
   x = 3,463,005.06/1,860.89
6. Step 6: Final answer
   x = 1,860.95