Finding the Fourth Proportional to 2,100.42, 3,149.58 and 1,223.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.42 : 3,149.58 = 1,223.21 : x
2. Step 2: Convert to fraction form
   2,100.42/3,149.58 = 1,223.21/x
3. Step 3: Cross multiply
   2,100.42x = 3,149.58 × 1,223.21
4. Step 4: Simplify right side
   2,100.42x = 3,852,597.75
5. Step 5: Solve for x
   x = 3,852,597.75/2,100.42
6. Step 6: Final answer
   x = 1,834.20