Finding the Fourth Proportional to 1,445.30, 1,994.18 and 855.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.30 : 1,994.18 = 855.52 : x
2. Step 2: Convert to fraction form
   1,445.30/1,994.18 = 855.52/x
3. Step 3: Cross multiply
   1,445.30x = 1,994.18 × 855.52
4. Step 4: Simplify right side
   1,445.30x = 1,706,060.87
5. Step 5: Solve for x
   x = 1,706,060.87/1,445.30
6. Step 6: Final answer
   x = 1,180.42