Finding the Fourth Proportional to 3,990.79, 5,510.52 and 2,575.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.79 : 5,510.52 = 2,575.18 : x
2. Step 2: Convert to fraction form
   3,990.79/5,510.52 = 2,575.18/x
3. Step 3: Cross multiply
   3,990.79x = 5,510.52 × 2,575.18
4. Step 4: Simplify right side
   3,990.79x = 14,190,540.47
5. Step 5: Solve for x
   x = 14,190,540.47/3,990.79
6. Step 6: Final answer
   x = 3,555.83