Finding the Fourth Proportional to 1,811.97, 2,501.61 and 1,245.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.97 : 2,501.61 = 1,245.72 : x
2. Step 2: Convert to fraction form
   1,811.97/2,501.61 = 1,245.72/x
3. Step 3: Cross multiply
   1,811.97x = 2,501.61 × 1,245.72
4. Step 4: Simplify right side
   1,811.97x = 3,116,305.61
5. Step 5: Solve for x
   x = 3,116,305.61/1,811.97
6. Step 6: Final answer
   x = 1,719.84