Finding the Fourth Proportional to 1,801.98, 2,704.77 and 1,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.98 : 2,704.77 = 1,215.12 : x
2. Step 2: Convert to fraction form
   1,801.98/2,704.77 = 1,215.12/x
3. Step 3: Cross multiply
   1,801.98x = 2,704.77 × 1,215.12
4. Step 4: Simplify right side
   1,801.98x = 3,286,620.12
5. Step 5: Solve for x
   x = 3,286,620.12/1,801.98
6. Step 6: Final answer
   x = 1,823.89