Finding the Fourth Proportional to 1,646.69, 2,271.12 and 1,398.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.69 : 2,271.12 = 1,398.83 : x
2. Step 2: Convert to fraction form
   1,646.69/2,271.12 = 1,398.83/x
3. Step 3: Cross multiply
   1,646.69x = 2,271.12 × 1,398.83
4. Step 4: Simplify right side
   1,646.69x = 3,176,910.79
5. Step 5: Solve for x
   x = 3,176,910.79/1,646.69
6. Step 6: Final answer
   x = 1,929.27