Finding the Fourth Proportional to 2,179.58, 3,004.47 and 1,338.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.58 : 3,004.47 = 1,338.71 : x
2. Step 2: Convert to fraction form
   2,179.58/3,004.47 = 1,338.71/x
3. Step 3: Cross multiply
   2,179.58x = 3,004.47 × 1,338.71
4. Step 4: Simplify right side
   2,179.58x = 4,022,099.01
5. Step 5: Solve for x
   x = 4,022,099.01/2,179.58
6. Step 6: Final answer
   x = 1,845.36