Finding the Fourth Proportional to 1,991.52, 2,748.50 and 1,107.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.52 : 2,748.50 = 1,107.60 : x
2. Step 2: Convert to fraction form
   1,991.52/2,748.50 = 1,107.60/x
3. Step 3: Cross multiply
   1,991.52x = 2,748.50 × 1,107.60
4. Step 4: Simplify right side
   1,991.52x = 3,044,238.60
5. Step 5: Solve for x
   x = 3,044,238.60/1,991.52
6. Step 6: Final answer
   x = 1,528.60