Finding the Fourth Proportional to 1,991.67, 2,748.33 and 1,107.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.67 : 2,748.33 = 1,107.42 : x
2. Step 2: Convert to fraction form
   1,991.67/2,748.33 = 1,107.42/x
3. Step 3: Cross multiply
   1,991.67x = 2,748.33 × 1,107.42
4. Step 4: Simplify right side
   1,991.67x = 3,043,555.61
5. Step 5: Solve for x
   x = 3,043,555.61/1,991.67
6. Step 6: Final answer
   x = 1,528.14