Finding the Fourth Proportional to 2,099.86, 3,158.02 and 1,771.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.86 : 3,158.02 = 1,771.81 : x
2. Step 2: Convert to fraction form
   2,099.86/3,158.02 = 1,771.81/x
3. Step 3: Cross multiply
   2,099.86x = 3,158.02 × 1,771.81
4. Step 4: Simplify right side
   2,099.86x = 5,595,395.63
5. Step 5: Solve for x
   x = 5,595,395.63/2,099.86
6. Step 6: Final answer
   x = 2,664.66