Finding the Fourth Proportional to 3,128.86, 4,313.23 and 2,381.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.86 : 4,313.23 = 2,381.52 : x
2. Step 2: Convert to fraction form
   3,128.86/4,313.23 = 2,381.52/x
3. Step 3: Cross multiply
   3,128.86x = 4,313.23 × 2,381.52
4. Step 4: Simplify right side
   3,128.86x = 10,272,029.47
5. Step 5: Solve for x
   x = 10,272,029.47/3,128.86
6. Step 6: Final answer
   x = 3,282.99