Finding the Fourth Proportional to 3,890.86, 5,834.01 and 2,659.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.86 : 5,834.01 = 2,659.76 : x
2. Step 2: Convert to fraction form
   3,890.86/5,834.01 = 2,659.76/x
3. Step 3: Cross multiply
   3,890.86x = 5,834.01 × 2,659.76
4. Step 4: Simplify right side
   3,890.86x = 15,517,066.44
5. Step 5: Solve for x
   x = 15,517,066.44/3,890.86
6. Step 6: Final answer
   x = 3,988.08