Finding the Fourth Proportional to 1,553.34, 2,143.61 and 854.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.34 : 2,143.61 = 854.72 : x
2. Step 2: Convert to fraction form
   1,553.34/2,143.61 = 854.72/x
3. Step 3: Cross multiply
   1,553.34x = 2,143.61 × 854.72
4. Step 4: Simplify right side
   1,553.34x = 1,832,187.40
5. Step 5: Solve for x
   x = 1,832,187.40/1,553.34
6. Step 6: Final answer
   x = 1,179.51