Finding the Fourth Proportional to 2,991.28, 4,486.23 and 1,141.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.28 : 4,486.23 = 1,141.72 : x
2. Step 2: Convert to fraction form
   2,991.28/4,486.23 = 1,141.72/x
3. Step 3: Cross multiply
   2,991.28x = 4,486.23 × 1,141.72
4. Step 4: Simplify right side
   2,991.28x = 5,122,018.52
5. Step 5: Solve for x
   x = 5,122,018.52/2,991.28
6. Step 6: Final answer
   x = 1,712.32