Finding the Fourth Proportional to 2,100.53, 3,149.89 and 1,223.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.53 : 3,149.89 = 1,223.91 : x
2. Step 2: Convert to fraction form
   2,100.53/3,149.89 = 1,223.91/x
3. Step 3: Cross multiply
   2,100.53x = 3,149.89 × 1,223.91
4. Step 4: Simplify right side
   2,100.53x = 3,855,178.81
5. Step 5: Solve for x
   x = 3,855,178.81/2,100.53
6. Step 6: Final answer
   x = 1,835.33