Finding the Fourth Proportional to 1,553.15, 2,143.30 and 854.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.15 : 2,143.30 = 854.52 : x
2. Step 2: Convert to fraction form
   1,553.15/2,143.30 = 854.52/x
3. Step 3: Cross multiply
   1,553.15x = 2,143.30 × 854.52
4. Step 4: Simplify right side
   1,553.15x = 1,831,492.72
5. Step 5: Solve for x
   x = 1,831,492.72/1,553.15
6. Step 6: Final answer
   x = 1,179.21