Finding the Fourth Proportional to 2,659.13, 3,990.21 and 2,516.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.13 : 3,990.21 = 2,516.62 : x
2. Step 2: Convert to fraction form
   2,659.13/3,990.21 = 2,516.62/x
3. Step 3: Cross multiply
   2,659.13x = 3,990.21 × 2,516.62
4. Step 4: Simplify right side
   2,659.13x = 10,041,832.31
5. Step 5: Solve for x
   x = 10,041,832.31/2,659.13
6. Step 6: Final answer
   x = 3,776.36