Finding the Fourth Proportional to 1,991.30, 2,748.33 and 1,152.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.30 : 2,748.33 = 1,152.51 : x
2. Step 2: Convert to fraction form
   1,991.30/2,748.33 = 1,152.51/x
3. Step 3: Cross multiply
   1,991.30x = 2,748.33 × 1,152.51
4. Step 4: Simplify right side
   1,991.30x = 3,167,472.05
5. Step 5: Solve for x
   x = 3,167,472.05/1,991.30
6. Step 6: Final answer
   x = 1,590.66