Finding the Fourth Proportional to 1,552.34, 2,142.15 and 853.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,552.34 : 2,142.15 = 853.58 : x
2. Step 2: Convert to fraction form
   1,552.34/2,142.15 = 853.58/x
3. Step 3: Cross multiply
   1,552.34x = 2,142.15 × 853.58
4. Step 4: Simplify right side
   1,552.34x = 1,828,496.40
5. Step 5: Solve for x
   x = 1,828,496.40/1,552.34
6. Step 6: Final answer
   x = 1,177.90