Finding the Fourth Proportional to 2,991.59, 4,128.41 and 1,811.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.59 : 4,128.41 = 1,811.82 : x
2. Step 2: Convert to fraction form
   2,991.59/4,128.41 = 1,811.82/x
3. Step 3: Cross multiply
   2,991.59x = 4,128.41 × 1,811.82
4. Step 4: Simplify right side
   2,991.59x = 7,479,935.81
5. Step 5: Solve for x
   x = 7,479,935.81/2,991.59
6. Step 6: Final answer
   x = 2,500.32