Finding the Fourth Proportional to 1,619.94, 2,236.83 and 1,538.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.94 : 2,236.83 = 1,538.40 : x
2. Step 2: Convert to fraction form
   1,619.94/2,236.83 = 1,538.40/x
3. Step 3: Cross multiply
   1,619.94x = 2,236.83 × 1,538.40
4. Step 4: Simplify right side
   1,619.94x = 3,441,139.27
5. Step 5: Solve for x
   x = 3,441,139.27/1,619.94
6. Step 6: Final answer
   x = 2,124.24