Finding the Fourth Proportional to 1,134.20, 1,698.00 and 861.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.20 : 1,698.00 = 861.37 : x
2. Step 2: Convert to fraction form
   1,134.20/1,698.00 = 861.37/x
3. Step 3: Cross multiply
   1,134.20x = 1,698.00 × 861.37
4. Step 4: Simplify right side
   1,134.20x = 1,462,598.78
5. Step 5: Solve for x
   x = 1,462,598.78/1,134.20
6. Step 6: Final answer
   x = 1,289.54