Finding the Fourth Proportional to 1,811.57, 2,499.86 and 1,025.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.57 : 2,499.86 = 1,025.60 : x
2. Step 2: Convert to fraction form
   1,811.57/2,499.86 = 1,025.60/x
3. Step 3: Cross multiply
   1,811.57x = 2,499.86 × 1,025.60
4. Step 4: Simplify right side
   1,811.57x = 2,563,846.48
5. Step 5: Solve for x
   x = 2,563,846.48/1,811.57
6. Step 6: Final answer
   x = 1,415.27