Finding the Fourth Proportional to 1,445.23, 1,994.34 and 855.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.23 : 1,994.34 = 855.82 : x
2. Step 2: Convert to fraction form
   1,445.23/1,994.34 = 855.82/x
3. Step 3: Cross multiply
   1,445.23x = 1,994.34 × 855.82
4. Step 4: Simplify right side
   1,445.23x = 1,706,796.06
5. Step 5: Solve for x
   x = 1,706,796.06/1,445.23
6. Step 6: Final answer
   x = 1,180.99