Finding the Fourth Proportional to 1,991.91, 2,749.06 and 1,152.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.91 : 2,749.06 = 1,152.61 : x
2. Step 2: Convert to fraction form
   1,991.91/2,749.06 = 1,152.61/x
3. Step 3: Cross multiply
   1,991.91x = 2,749.06 × 1,152.61
4. Step 4: Simplify right side
   1,991.91x = 3,168,588.61
5. Step 5: Solve for x
   x = 3,168,588.61/1,991.91
6. Step 6: Final answer
   x = 1,590.73