Finding the Fourth Proportional to 3,700.89, 5,105.43 and 2,817.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.89 : 5,105.43 = 2,817.59 : x
2. Step 2: Convert to fraction form
   3,700.89/5,105.43 = 2,817.59/x
3. Step 3: Cross multiply
   3,700.89x = 5,105.43 × 2,817.59
4. Step 4: Simplify right side
   3,700.89x = 14,384,982.99
5. Step 5: Solve for x
   x = 14,384,982.99/3,700.89
6. Step 6: Final answer
   x = 3,886.90