Finding the Fourth Proportional to 3,781.61, 5,218.31 and 2,103.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.61 : 5,218.31 = 2,103.02 : x
2. Step 2: Convert to fraction form
   3,781.61/5,218.31 = 2,103.02/x
3. Step 3: Cross multiply
   3,781.61x = 5,218.31 × 2,103.02
4. Step 4: Simplify right side
   3,781.61x = 10,974,189.46
5. Step 5: Solve for x
   x = 10,974,189.46/3,781.61
6. Step 6: Final answer
   x = 2,901.99