Finding the Fourth Proportional to 2,186,287.20, 3,278,118.60 and 1,123,405.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186,287.20 : 3,278,118.60 = 1,123,405.20 : x
2. Step 2: Convert to fraction form
   2,186,287.20/3,278,118.60 = 1,123,405.20/x
3. Step 3: Cross multiply
   2,186,287.20x = 3,278,118.60 × 1,123,405.20
4. Step 4: Simplify right side
   2,186,287.20x = 3,682,655,481,456.72
5. Step 5: Solve for x
   x = 3,682,655,481,456.72/2,186,287.20
6. Step 6: Final answer
   x = 1,684,433.54