Finding the Fourth Proportional to 2,020.77, 2,787.72 and 1,181.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.77 : 2,787.72 = 1,181.51 : x
2. Step 2: Convert to fraction form
   2,020.77/2,787.72 = 1,181.51/x
3. Step 3: Cross multiply
   2,020.77x = 2,787.72 × 1,181.51
4. Step 4: Simplify right side
   2,020.77x = 3,293,705.12
5. Step 5: Solve for x
   x = 3,293,705.12/2,020.77
6. Step 6: Final answer
   x = 1,629.93