Finding the Fourth Proportional to 1,554.76, 2,145.54 and 856.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.76 : 2,145.54 = 856.12 : x
2. Step 2: Convert to fraction form
   1,554.76/2,145.54 = 856.12/x
3. Step 3: Cross multiply
   1,554.76x = 2,145.54 × 856.12
4. Step 4: Simplify right side
   1,554.76x = 1,836,839.70
5. Step 5: Solve for x
   x = 1,836,839.70/1,554.76
6. Step 6: Final answer
   x = 1,181.43