Finding the Fourth Proportional to 1,811.40, 2,499.72 and 1,025.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.40 : 2,499.72 = 1,025.43 : x
2. Step 2: Convert to fraction form
   1,811.40/2,499.72 = 1,025.43/x
3. Step 3: Cross multiply
   1,811.40x = 2,499.72 × 1,025.43
4. Step 4: Simplify right side
   1,811.40x = 2,563,287.88
5. Step 5: Solve for x
   x = 2,563,287.88/1,811.40
6. Step 6: Final answer
   x = 1,415.09