Finding the Fourth Proportional to 2,158.86, 3,238.61 and 698.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.86 : 3,238.61 = 698.16 : x
2. Step 2: Convert to fraction form
   2,158.86/3,238.61 = 698.16/x
3. Step 3: Cross multiply
   2,158.86x = 3,238.61 × 698.16
4. Step 4: Simplify right side
   2,158.86x = 2,261,064.47
5. Step 5: Solve for x
   x = 2,261,064.47/2,158.86
6. Step 6: Final answer
   x = 1,047.34