Finding the Fourth Proportional to 1,991.46, 2,748.22 and 1,107.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.46 : 2,748.22 = 1,107.34 : x
2. Step 2: Convert to fraction form
   1,991.46/2,748.22 = 1,107.34/x
3. Step 3: Cross multiply
   1,991.46x = 2,748.22 × 1,107.34
4. Step 4: Simplify right side
   1,991.46x = 3,043,213.93
5. Step 5: Solve for x
   x = 3,043,213.93/1,991.46
6. Step 6: Final answer
   x = 1,528.13