Finding the Fourth Proportional to 1,354.54, 1,869.54 and 856.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.54 : 1,869.54 = 856.94 : x
2. Step 2: Convert to fraction form
   1,354.54/1,869.54 = 856.94/x
3. Step 3: Cross multiply
   1,354.54x = 1,869.54 × 856.94
4. Step 4: Simplify right side
   1,354.54x = 1,602,083.61
5. Step 5: Solve for x
   x = 1,602,083.61/1,354.54
6. Step 6: Final answer
   x = 1,182.75