Finding the Fourth Proportional to 1,964.32, 2,711.76 and 1,857.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.32 : 2,711.76 = 1,857.12 : x
2. Step 2: Convert to fraction form
   1,964.32/2,711.76 = 1,857.12/x
3. Step 3: Cross multiply
   1,964.32x = 2,711.76 × 1,857.12
4. Step 4: Simplify right side
   1,964.32x = 5,036,063.73
5. Step 5: Solve for x
   x = 5,036,063.73/1,964.32
6. Step 6: Final answer
   x = 2,563.77