Finding the Fourth Proportional to 1,807.28, 2,711.82 and 712.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.28 : 2,711.82 = 712.43 : x
2. Step 2: Convert to fraction form
   1,807.28/2,711.82 = 712.43/x
3. Step 3: Cross multiply
   1,807.28x = 2,711.82 × 712.43
4. Step 4: Simplify right side
   1,807.28x = 1,931,968.36
5. Step 5: Solve for x
   x = 1,931,968.36/1,807.28
6. Step 6: Final answer
   x = 1,069.00