Finding the Fourth Proportional to 1,395.63, 1,922.13 and 1,146.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.63 : 1,922.13 = 1,146.15 : x
2. Step 2: Convert to fraction form
   1,395.63/1,922.13 = 1,146.15/x
3. Step 3: Cross multiply
   1,395.63x = 1,922.13 × 1,146.15
4. Step 4: Simplify right side
   1,395.63x = 2,203,049.30
5. Step 5: Solve for x
   x = 2,203,049.30/1,395.63
6. Step 6: Final answer
   x = 1,578.53