Finding the Fourth Proportional to 3,781.51, 5,218.50 and 2,103.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.51 : 5,218.50 = 2,103.07 : x
2. Step 2: Convert to fraction form
   3,781.51/5,218.50 = 2,103.07/x
3. Step 3: Cross multiply
   3,781.51x = 5,218.50 × 2,103.07
4. Step 4: Simplify right side
   3,781.51x = 10,974,870.80
5. Step 5: Solve for x
   x = 10,974,870.80/3,781.51
6. Step 6: Final answer
   x = 2,902.25