Finding the Fourth Proportional to 1,035.94, 1,561.01 and 857.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,035.94 : 1,561.01 = 857.34 : x
2. Step 2: Convert to fraction form
   1,035.94/1,561.01 = 857.34/x
3. Step 3: Cross multiply
   1,035.94x = 1,561.01 × 857.34
4. Step 4: Simplify right side
   1,035.94x = 1,338,316.31
5. Step 5: Solve for x
   x = 1,338,316.31/1,035.94
6. Step 6: Final answer
   x = 1,291.89