Finding the Fourth Proportional to 3,631.31, 5,011.38 and 2,139.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,631.31 : 5,011.38 = 2,139.29 : x
2. Step 2: Convert to fraction form
   3,631.31/5,011.38 = 2,139.29/x
3. Step 3: Cross multiply
   3,631.31x = 5,011.38 × 2,139.29
4. Step 4: Simplify right side
   3,631.31x = 10,720,784.42
5. Step 5: Solve for x
   x = 10,720,784.42/3,631.31
6. Step 6: Final answer
   x = 2,952.32