Finding the Fourth Proportional to 2,500.51, 3,420.72 and 2,489.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.51 : 3,420.72 = 2,489.98 : x
2. Step 2: Convert to fraction form
   2,500.51/3,420.72 = 2,489.98/x
3. Step 3: Cross multiply
   2,500.51x = 3,420.72 × 2,489.98
4. Step 4: Simplify right side
   2,500.51x = 8,517,524.39
5. Step 5: Solve for x
   x = 8,517,524.39/2,500.51
6. Step 6: Final answer
   x = 3,406.31