Finding the Fourth Proportional to 2,313.43, 3,193.13 and 1,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,313.43 : 3,193.13 = 1,428.72 : x
2. Step 2: Convert to fraction form
   2,313.43/3,193.13 = 1,428.72/x
3. Step 3: Cross multiply
   2,313.43x = 3,193.13 × 1,428.72
4. Step 4: Simplify right side
   2,313.43x = 4,562,088.69
5. Step 5: Solve for x
   x = 4,562,088.69/2,313.43
6. Step 6: Final answer
   x = 1,972.00