Finding the Fourth Proportional to 1,405.25, 1,938.85 and 873.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.25 : 1,938.85 = 873.99 : x
2. Step 2: Convert to fraction form
   1,405.25/1,938.85 = 873.99/x
3. Step 3: Cross multiply
   1,405.25x = 1,938.85 × 873.99
4. Step 4: Simplify right side
   1,405.25x = 1,694,533.33
5. Step 5: Solve for x
   x = 1,694,533.33/1,405.25
6. Step 6: Final answer
   x = 1,205.86