Finding the Fourth Proportional to 3,890.76, 5,830.94 and 2,133.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.76 : 5,830.94 = 2,133.10 : x
2. Step 2: Convert to fraction form
   3,890.76/5,830.94 = 2,133.10/x
3. Step 3: Cross multiply
   3,890.76x = 5,830.94 × 2,133.10
4. Step 4: Simplify right side
   3,890.76x = 12,437,978.11
5. Step 5: Solve for x
   x = 12,437,978.11/3,890.76
6. Step 6: Final answer
   x = 3,196.80