Finding the Fourth Proportional to 3,810.38, 5,258.21 and 2,131.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.38 : 5,258.21 = 2,131.93 : x
2. Step 2: Convert to fraction form
   3,810.38/5,258.21 = 2,131.93/x
3. Step 3: Cross multiply
   3,810.38x = 5,258.21 × 2,131.93
4. Step 4: Simplify right side
   3,810.38x = 11,210,098.69
5. Step 5: Solve for x
   x = 11,210,098.69/3,810.38
6. Step 6: Final answer
   x = 2,941.99