Finding the Fourth Proportional to 1,801.28, 2,698.72 and 1,222.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.28 : 2,698.72 = 1,222.08 : x
2. Step 2: Convert to fraction form
   1,801.28/2,698.72 = 1,222.08/x
3. Step 3: Cross multiply
   1,801.28x = 2,698.72 × 1,222.08
4. Step 4: Simplify right side
   1,801.28x = 3,298,051.74
5. Step 5: Solve for x
   x = 3,298,051.74/1,801.28
6. Step 6: Final answer
   x = 1,830.95