Finding the Fourth Proportional to 2,620.89, 3,927.83 and 2,291.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.89 : 3,927.83 = 2,291.02 : x
2. Step 2: Convert to fraction form
   2,620.89/3,927.83 = 2,291.02/x
3. Step 3: Cross multiply
   2,620.89x = 3,927.83 × 2,291.02
4. Step 4: Simplify right side
   2,620.89x = 8,998,715.81
5. Step 5: Solve for x
   x = 8,998,715.81/2,620.89
6. Step 6: Final answer
   x = 3,433.46