Finding the Fourth Proportional to 1,554.52, 2,145.24 and 855.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.52 : 2,145.24 = 855.88 : x
2. Step 2: Convert to fraction form
   1,554.52/2,145.24 = 855.88/x
3. Step 3: Cross multiply
   1,554.52x = 2,145.24 × 855.88
4. Step 4: Simplify right side
   1,554.52x = 1,836,068.01
5. Step 5: Solve for x
   x = 1,836,068.01/1,554.52
6. Step 6: Final answer
   x = 1,181.12