Finding the Fourth Proportional to 1,553.32, 2,143.61 and 854.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.32 : 2,143.61 = 854.68 : x
2. Step 2: Convert to fraction form
   1,553.32/2,143.61 = 854.68/x
3. Step 3: Cross multiply
   1,553.32x = 2,143.61 × 854.68
4. Step 4: Simplify right side
   1,553.32x = 1,832,100.59
5. Step 5: Solve for x
   x = 1,832,100.59/1,553.32
6. Step 6: Final answer
   x = 1,179.47