Finding the Fourth Proportional to 2,158.40, 3,231.98 and 1,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.40 : 3,231.98 = 1,499.30 : x
2. Step 2: Convert to fraction form
   2,158.40/3,231.98 = 1,499.30/x
3. Step 3: Cross multiply
   2,158.40x = 3,231.98 × 1,499.30
4. Step 4: Simplify right side
   2,158.40x = 4,845,707.61
5. Step 5: Solve for x
   x = 4,845,707.61/2,158.40
6. Step 6: Final answer
   x = 2,245.05