Finding the Fourth Proportional to 1,140.37, 1,573.89 and 698.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.37 : 1,573.89 = 698.56 : x
2. Step 2: Convert to fraction form
   1,140.37/1,573.89 = 698.56/x
3. Step 3: Cross multiply
   1,140.37x = 1,573.89 × 698.56
4. Step 4: Simplify right side
   1,140.37x = 1,099,456.60
5. Step 5: Solve for x
   x = 1,099,456.60/1,140.37
6. Step 6: Final answer
   x = 964.12