Finding the Fourth Proportional to 2,538.32, 3,810.18 and 2,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.32 : 3,810.18 = 2,131.89 : x
2. Step 2: Convert to fraction form
   2,538.32/3,810.18 = 2,131.89/x
3. Step 3: Cross multiply
   2,538.32x = 3,810.18 × 2,131.89
4. Step 4: Simplify right side
   2,538.32x = 8,122,884.64
5. Step 5: Solve for x
   x = 8,122,884.64/2,538.32
6. Step 6: Final answer
   x = 3,200.11