Finding the Fourth Proportional to 1,554.61, 2,145.37 and 855.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.61 : 2,145.37 = 855.98 : x
2. Step 2: Convert to fraction form
   1,554.61/2,145.37 = 855.98/x
3. Step 3: Cross multiply
   1,554.61x = 2,145.37 × 855.98
4. Step 4: Simplify right side
   1,554.61x = 1,836,402.66
5. Step 5: Solve for x
   x = 1,836,402.66/1,554.61
6. Step 6: Final answer
   x = 1,181.26