Finding the Fourth Proportional to 3,685.83, 5,085.57 and 2,250.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.83 : 5,085.57 = 2,250.90 : x
2. Step 2: Convert to fraction form
   3,685.83/5,085.57 = 2,250.90/x
3. Step 3: Cross multiply
   3,685.83x = 5,085.57 × 2,250.90
4. Step 4: Simplify right side
   3,685.83x = 11,447,109.51
5. Step 5: Solve for x
   x = 11,447,109.51/3,685.83
6. Step 6: Final answer
   x = 3,105.71