Finding the Fourth Proportional to 1,779.80, 2,456.22 and 993.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,779.80 : 2,456.22 = 993.89 : x
2. Step 2: Convert to fraction form
   1,779.80/2,456.22 = 993.89/x
3. Step 3: Cross multiply
   1,779.80x = 2,456.22 × 993.89
4. Step 4: Simplify right side
   1,779.80x = 2,441,222.36
5. Step 5: Solve for x
   x = 2,441,222.36/1,779.80
6. Step 6: Final answer
   x = 1,371.63