Finding the Fourth Proportional to 2,159.31, 3,238.88 and 1,222.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.31 : 3,238.88 = 1,222.32 : x
2. Step 2: Convert to fraction form
   2,159.31/3,238.88 = 1,222.32/x
3. Step 3: Cross multiply
   2,159.31x = 3,238.88 × 1,222.32
4. Step 4: Simplify right side
   2,159.31x = 3,958,941.69
5. Step 5: Solve for x
   x = 3,958,941.69/2,159.31
6. Step 6: Final answer
   x = 1,833.43