Finding the Fourth Proportional to 3,710.51, 5,120.42 and 2,031.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,710.51 : 5,120.42 = 2,031.89 : x
2. Step 2: Convert to fraction form
   3,710.51/5,120.42 = 2,031.89/x
3. Step 3: Cross multiply
   3,710.51x = 5,120.42 × 2,031.89
4. Step 4: Simplify right side
   3,710.51x = 10,404,094.43
5. Step 5: Solve for x
   x = 10,404,094.43/3,710.51
6. Step 6: Final answer
   x = 2,803.95