Finding the Fourth Proportional to 3,704.01, 5,112.09 and 2,131.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,704.01 : 5,112.09 = 2,131.80 : x
2. Step 2: Convert to fraction form
   3,704.01/5,112.09 = 2,131.80/x
3. Step 3: Cross multiply
   3,704.01x = 5,112.09 × 2,131.80
4. Step 4: Simplify right side
   3,704.01x = 10,897,953.46
5. Step 5: Solve for x
   x = 10,897,953.46/3,704.01
6. Step 6: Final answer
   x = 2,942.20