Finding the Fourth Proportional to 2,499.86, 3,450.23 and 2,389.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.86 : 3,450.23 = 2,389.15 : x
2. Step 2: Convert to fraction form
   2,499.86/3,450.23 = 2,389.15/x
3. Step 3: Cross multiply
   2,499.86x = 3,450.23 × 2,389.15
4. Step 4: Simplify right side
   2,499.86x = 8,243,087.81
5. Step 5: Solve for x
   x = 8,243,087.81/2,499.86
6. Step 6: Final answer
   x = 3,297.43