Finding the Fourth Proportional to 1,225.62, 1,691.96 and 852.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.62 : 1,691.96 = 852.89 : x
2. Step 2: Convert to fraction form
   1,225.62/1,691.96 = 852.89/x
3. Step 3: Cross multiply
   1,225.62x = 1,691.96 × 852.89
4. Step 4: Simplify right side
   1,225.62x = 1,443,043.04
5. Step 5: Solve for x
   x = 1,443,043.04/1,225.62
6. Step 6: Final answer
   x = 1,177.40