Finding the Fourth Proportional to 1,807.34, 2,709.57 and 711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.34 : 2,709.57 = 711.50 : x
2. Step 2: Convert to fraction form
   1,807.34/2,709.57 = 711.50/x
3. Step 3: Cross multiply
   1,807.34x = 2,709.57 × 711.50
4. Step 4: Simplify right side
   1,807.34x = 1,927,859.06
5. Step 5: Solve for x
   x = 1,927,859.06/1,807.34
6. Step 6: Final answer
   x = 1,066.68