Finding the Fourth Proportional to 1,813.47, 2,498.73 and 1,222.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.47 : 2,498.73 = 1,222.98 : x
2. Step 2: Convert to fraction form
   1,813.47/2,498.73 = 1,222.98/x
3. Step 3: Cross multiply
   1,813.47x = 2,498.73 × 1,222.98
4. Step 4: Simplify right side
   1,813.47x = 3,055,896.82
5. Step 5: Solve for x
   x = 3,055,896.82/1,813.47
6. Step 6: Final answer
   x = 1,685.11