Finding the Fourth Proportional to 1,371.72, 2,054.30 and 711.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.72 : 2,054.30 = 711.84 : x
2. Step 2: Convert to fraction form
   1,371.72/2,054.30 = 711.84/x
3. Step 3: Cross multiply
   1,371.72x = 2,054.30 × 711.84
4. Step 4: Simplify right side
   1,371.72x = 1,462,332.91
5. Step 5: Solve for x
   x = 1,462,332.91/1,371.72
6. Step 6: Final answer
   x = 1,066.06