Finding the Fourth Proportional to 1,777.32, 2,452.71 and 991.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,777.32 : 2,452.71 = 991.37 : x
2. Step 2: Convert to fraction form
   1,777.32/2,452.71 = 991.37/x
3. Step 3: Cross multiply
   1,777.32x = 2,452.71 × 991.37
4. Step 4: Simplify right side
   1,777.32x = 2,431,530.85
5. Step 5: Solve for x
   x = 2,431,530.85/1,777.32
6. Step 6: Final answer
   x = 1,368.09