Finding the Fourth Proportional to 2,745, 3,788.15 and 1,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,745 : 3,788.15 = 1,998.72 : x
2. Step 2: Convert to fraction form
   2,745/3,788.15 = 1,998.72/x
3. Step 3: Cross multiply
   2,745x = 3,788.15 × 1,998.72
4. Step 4: Simplify right side
   2,745x = 7,571,441.17
5. Step 5: Solve for x
   x = 7,571,441.17/2,745
6. Step 6: Final answer
   x = 2,758.27