Finding the Fourth Proportional to 1,811.67, 2,498.50 and 1,223.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.67 : 2,498.50 = 1,223.00 : x
2. Step 2: Convert to fraction form
   1,811.67/2,498.50 = 1,223.00/x
3. Step 3: Cross multiply
   1,811.67x = 2,498.50 × 1,223.00
4. Step 4: Simplify right side
   1,811.67x = 3,055,657.03
5. Step 5: Solve for x
   x = 3,055,657.03/1,811.67
6. Step 6: Final answer
   x = 1,686.66