Finding the Fourth Proportional to 1,860.17, 2,788.58 and 1,200.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.17 : 2,788.58 = 1,200.27 : x
2. Step 2: Convert to fraction form
   1,860.17/2,788.58 = 1,200.27/x
3. Step 3: Cross multiply
   1,860.17x = 2,788.58 × 1,200.27
4. Step 4: Simplify right side
   1,860.17x = 3,347,039.94
5. Step 5: Solve for x
   x = 3,347,039.94/1,860.17
6. Step 6: Final answer
   x = 1,799.32