Finding the Fourth Proportional to 1,404.88, 1,938.47 and 873.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.88 : 1,938.47 = 873.90 : x
2. Step 2: Convert to fraction form
   1,404.88/1,938.47 = 873.90/x
3. Step 3: Cross multiply
   1,404.88x = 1,938.47 × 873.90
4. Step 4: Simplify right side
   1,404.88x = 1,694,024.56
5. Step 5: Solve for x
   x = 1,694,024.56/1,404.88
6. Step 6: Final answer
   x = 1,205.82