Finding the Fourth Proportional to 1,342.05, 1,851.62 and 869.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.05 : 1,851.62 = 869.96 : x
2. Step 2: Convert to fraction form
   1,342.05/1,851.62 = 869.96/x
3. Step 3: Cross multiply
   1,342.05x = 1,851.62 × 869.96
4. Step 4: Simplify right side
   1,342.05x = 1,610,821.73
5. Step 5: Solve for x
   x = 1,610,821.73/1,342.05
6. Step 6: Final answer
   x = 1,200.27