Finding the Fourth Proportional to 1,886.33, 2,826.28 and 1,227.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.33 : 2,826.28 = 1,227.20 : x
2. Step 2: Convert to fraction form
   1,886.33/2,826.28 = 1,227.20/x
3. Step 3: Cross multiply
   1,886.33x = 2,826.28 × 1,227.20
4. Step 4: Simplify right side
   1,886.33x = 3,468,393.62
5. Step 5: Solve for x
   x = 3,468,393.62/1,886.33
6. Step 6: Final answer
   x = 1,838.70