Finding the Fourth Proportional to 1,554.90, 2,145.75 and 856.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.90 : 2,145.75 = 856.27 : x
2. Step 2: Convert to fraction form
   1,554.90/2,145.75 = 856.27/x
3. Step 3: Cross multiply
   1,554.90x = 2,145.75 × 856.27
4. Step 4: Simplify right side
   1,554.90x = 1,837,340.82
5. Step 5: Solve for x
   x = 1,837,340.82/1,554.90
6. Step 6: Final answer
   x = 1,181.65