Finding the Fourth Proportional to 2,386.19, 3,292.89 and 1,338.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.19 : 3,292.89 = 1,338.28 : x
2. Step 2: Convert to fraction form
   2,386.19/3,292.89 = 1,338.28/x
3. Step 3: Cross multiply
   2,386.19x = 3,292.89 × 1,338.28
4. Step 4: Simplify right side
   2,386.19x = 4,406,808.83
5. Step 5: Solve for x
   x = 4,406,808.83/2,386.19
6. Step 6: Final answer
   x = 1,846.80