Finding the Fourth Proportional to 1,553.31, 2,143.67 and 854.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.31 : 2,143.67 = 854.69 : x
2. Step 2: Convert to fraction form
   1,553.31/2,143.67 = 854.69/x
3. Step 3: Cross multiply
   1,553.31x = 2,143.67 × 854.69
4. Step 4: Simplify right side
   1,553.31x = 1,832,158.32
5. Step 5: Solve for x
   x = 1,832,158.32/1,553.31
6. Step 6: Final answer
   x = 1,179.52