Finding the Fourth Proportional to 3,541.82, 5,312.82 and 1,991.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,541.82 : 5,312.82 = 1,991.72 : x
2. Step 2: Convert to fraction form
   3,541.82/5,312.82 = 1,991.72/x
3. Step 3: Cross multiply
   3,541.82x = 5,312.82 × 1,991.72
4. Step 4: Simplify right side
   3,541.82x = 10,581,649.85
5. Step 5: Solve for x
   x = 10,581,649.85/3,541.82
6. Step 6: Final answer
   x = 2,987.63