Finding the Fourth Proportional to 2,159.72, 3,238.76 and 698.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.72 : 3,238.76 = 698.48 : x
2. Step 2: Convert to fraction form
   2,159.72/3,238.76 = 698.48/x
3. Step 3: Cross multiply
   2,159.72x = 3,238.76 × 698.48
4. Step 4: Simplify right side
   2,159.72x = 2,262,189.40
5. Step 5: Solve for x
   x = 2,262,189.40/2,159.72
6. Step 6: Final answer
   x = 1,047.45