Finding the Fourth Proportional to 1,777.32, 2,452.82 and 991.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,777.32 : 2,452.82 = 991.49 : x
2. Step 2: Convert to fraction form
   1,777.32/2,452.82 = 991.49/x
3. Step 3: Cross multiply
   1,777.32x = 2,452.82 × 991.49
4. Step 4: Simplify right side
   1,777.32x = 2,431,929.28
5. Step 5: Solve for x
   x = 2,431,929.28/1,777.32
6. Step 6: Final answer
   x = 1,368.31