Finding the Fourth Proportional to 1,801.71, 2,487.33 and 1,380.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.71 : 2,487.33 = 1,380.75 : x
2. Step 2: Convert to fraction form
   1,801.71/2,487.33 = 1,380.75/x
3. Step 3: Cross multiply
   1,801.71x = 2,487.33 × 1,380.75
4. Step 4: Simplify right side
   1,801.71x = 3,434,380.90
5. Step 5: Solve for x
   x = 3,434,380.90/1,801.71
6. Step 6: Final answer
   x = 1,906.18