Finding the Fourth Proportional to 1,991.69, 2,748.47 and 1,107.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.69 : 2,748.47 = 1,107.52 : x
2. Step 2: Convert to fraction form
   1,991.69/2,748.47 = 1,107.52/x
3. Step 3: Cross multiply
   1,991.69x = 2,748.47 × 1,107.52
4. Step 4: Simplify right side
   1,991.69x = 3,043,988.26
5. Step 5: Solve for x
   x = 3,043,988.26/1,991.69
6. Step 6: Final answer
   x = 1,528.35