Finding the Fourth Proportional to 1,904.37, 2,628.82 and 1,380.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,904.37 : 2,628.82 = 1,380.30 : x
2. Step 2: Convert to fraction form
   1,904.37/2,628.82 = 1,380.30/x
3. Step 3: Cross multiply
   1,904.37x = 2,628.82 × 1,380.30
4. Step 4: Simplify right side
   1,904.37x = 3,628,560.25
5. Step 5: Solve for x
   x = 3,628,560.25/1,904.37
6. Step 6: Final answer
   x = 1,905.39