Finding the Fourth Proportional to 2,100.31, 3,153.23 and 1,223.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.31 : 3,153.23 = 1,223.62 : x
2. Step 2: Convert to fraction form
   2,100.31/3,153.23 = 1,223.62/x
3. Step 3: Cross multiply
   2,100.31x = 3,153.23 × 1,223.62
4. Step 4: Simplify right side
   2,100.31x = 3,858,339.53
5. Step 5: Solve for x
   x = 3,858,339.53/2,100.31
6. Step 6: Final answer
   x = 1,837.04