Finding the Fourth Proportional to 1,601.35, 2,205.43 and 1,380.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.35 : 2,205.43 = 1,380.22 : x
2. Step 2: Convert to fraction form
   1,601.35/2,205.43 = 1,380.22/x
3. Step 3: Cross multiply
   1,601.35x = 2,205.43 × 1,380.22
4. Step 4: Simplify right side
   1,601.35x = 3,043,969.63
5. Step 5: Solve for x
   x = 3,043,969.63/1,601.35
6. Step 6: Final answer
   x = 1,900.88