Finding the Fourth Proportional to 3,810.54, 5,258.02 and 2,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.54 : 5,258.02 = 2,131.86 : x
2. Step 2: Convert to fraction form
   3,810.54/5,258.02 = 2,131.86/x
3. Step 3: Cross multiply
   3,810.54x = 5,258.02 × 2,131.86
4. Step 4: Simplify right side
   3,810.54x = 11,209,362.52
5. Step 5: Solve for x
   x = 11,209,362.52/3,810.54
6. Step 6: Final answer
   x = 2,941.67