Finding the Fourth Proportional to 1,777.23, 2,452.59 and 991.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,777.23 : 2,452.59 = 991.33 : x
2. Step 2: Convert to fraction form
   1,777.23/2,452.59 = 991.33/x
3. Step 3: Cross multiply
   1,777.23x = 2,452.59 × 991.33
4. Step 4: Simplify right side
   1,777.23x = 2,431,308.83
5. Step 5: Solve for x
   x = 2,431,308.83/1,777.23
6. Step 6: Final answer
   x = 1,368.03