Finding the Fourth Proportional to 3,390.71, 5,085.76 and 1,199.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.71 : 5,085.76 = 1,199.33 : x
2. Step 2: Convert to fraction form
   3,390.71/5,085.76 = 1,199.33/x
3. Step 3: Cross multiply
   3,390.71x = 5,085.76 × 1,199.33
4. Step 4: Simplify right side
   3,390.71x = 6,099,504.54
5. Step 5: Solve for x
   x = 6,099,504.54/3,390.71
6. Step 6: Final answer
   x = 1,798.89