Finding the Fourth Proportional to 1,554.82, 2,145.63 and 856.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.82 : 2,145.63 = 856.18 : x
2. Step 2: Convert to fraction form
   1,554.82/2,145.63 = 856.18/x
3. Step 3: Cross multiply
   1,554.82x = 2,145.63 × 856.18
4. Step 4: Simplify right side
   1,554.82x = 1,837,045.49
5. Step 5: Solve for x
   x = 1,837,045.49/1,554.82
6. Step 6: Final answer
   x = 1,181.52